diff --git a/bramble-api/src/main/java/org/briarproject/bramble/api/connection/ConnectionRegistry.java b/bramble-api/src/main/java/org/briarproject/bramble/api/connection/ConnectionRegistry.java
index 715a4da9e..6afc2ee7e 100644
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/connection/ConnectionRegistry.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/connection/ConnectionRegistry.java
@@ -40,6 +40,12 @@ public interface ConnectionRegistry {
 	 */
 	Collection<ContactId> getConnectedContacts(TransportId t);
 
+	/**
+	 * Returns any contacts that are connected via the given transport, or via
+	 * any transport that's preferred to the given transport.
+	 */
+	Collection<ContactId> getConnectedOrPreferredContacts(TransportId t);
+
 	/**
 	 * Returns true if the given contact is connected via the given transport.
 	 */
diff --git a/bramble-api/src/main/java/org/briarproject/bramble/api/plugin/PluginConfig.java b/bramble-api/src/main/java/org/briarproject/bramble/api/plugin/PluginConfig.java
index 6bf13cedd..4da41d6d2 100644
--- a/bramble-api/src/main/java/org/briarproject/bramble/api/plugin/PluginConfig.java
+++ b/bramble-api/src/main/java/org/briarproject/bramble/api/plugin/PluginConfig.java
@@ -1,10 +1,12 @@
 package org.briarproject.bramble.api.plugin;
 
+import org.briarproject.bramble.api.Pair;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPluginFactory;
 import org.briarproject.bramble.api.plugin.simplex.SimplexPluginFactory;
 
 import java.util.Collection;
+import java.util.List;
 
 @NotNullByDefault
 public interface PluginConfig {
@@ -14,4 +16,10 @@ public interface PluginConfig {
 	Collection<SimplexPluginFactory> getSimplexFactories();
 
 	boolean shouldPoll();
+
+	/**
+	 * Returns a list of transport preferences. For each pair in the list,
+	 * the first transport is preferred to the second.
+	 */
+	List<Pair<TransportId, TransportId>> getTransportPreferences();
 }
diff --git a/bramble-core/src/main/java/org/briarproject/bramble/connection/ConnectionRegistryImpl.java b/bramble-core/src/main/java/org/briarproject/bramble/connection/ConnectionRegistryImpl.java
index 1bba22593..0f580a4cd 100644
--- a/bramble-core/src/main/java/org/briarproject/bramble/connection/ConnectionRegistryImpl.java
+++ b/bramble-core/src/main/java/org/briarproject/bramble/connection/ConnectionRegistryImpl.java
@@ -1,11 +1,13 @@
 package org.briarproject.bramble.connection;
 
 import org.briarproject.bramble.api.Multiset;
+import org.briarproject.bramble.api.Pair;
 import org.briarproject.bramble.api.connection.ConnectionRegistry;
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.contact.PendingContactId;
 import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.plugin.PluginConfig;
 import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.plugin.event.ConnectionClosedEvent;
 import org.briarproject.bramble.api.plugin.event.ConnectionOpenedEvent;
@@ -16,7 +18,6 @@ import org.briarproject.bramble.api.rendezvous.event.RendezvousConnectionOpenedE
 
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
@@ -28,6 +29,7 @@ import javax.annotation.concurrent.GuardedBy;
 import javax.annotation.concurrent.ThreadSafe;
 import javax.inject.Inject;
 
+import static java.util.Collections.emptyList;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Logger.getLogger;
 
@@ -39,6 +41,7 @@ class ConnectionRegistryImpl implements ConnectionRegistry {
 			getLogger(ConnectionRegistryImpl.class.getName());
 
 	private final EventBus eventBus;
+	private final List<Pair<TransportId, TransportId>> preferences;
 
 	private final Object lock = new Object();
 	@GuardedBy("lock")
@@ -49,8 +52,9 @@ class ConnectionRegistryImpl implements ConnectionRegistry {
 	private final Set<PendingContactId> connectedPendingContacts;
 
 	@Inject
-	ConnectionRegistryImpl(EventBus eventBus) {
+	ConnectionRegistryImpl(EventBus eventBus, PluginConfig pluginConfig) {
 		this.eventBus = eventBus;
+		preferences = pluginConfig.getTransportPreferences();
 		contactConnections = new HashMap<>();
 		contactCounts = new Multiset<>();
 		connectedPendingContacts = new HashSet<>();
@@ -106,7 +110,7 @@ class ConnectionRegistryImpl implements ConnectionRegistry {
 	public Collection<ContactId> getConnectedContacts(TransportId t) {
 		synchronized (lock) {
 			Multiset<ContactId> m = contactConnections.get(t);
-			if (m == null) return Collections.emptyList();
+			if (m == null) return emptyList();
 			List<ContactId> ids = new ArrayList<>(m.keySet());
 			if (LOG.isLoggable(INFO))
 				LOG.info(ids.size() + " contacts connected: " + t);
@@ -114,6 +118,26 @@ class ConnectionRegistryImpl implements ConnectionRegistry {
 		}
 	}
 
+	@Override
+	public Collection<ContactId> getConnectedOrPreferredContacts(
+			TransportId t) {
+		synchronized (lock) {
+			Multiset<ContactId> m = contactConnections.get(t);
+			if (m == null) return emptyList();
+			Set<ContactId> ids = new HashSet<>(m.keySet());
+			for (Pair<TransportId, TransportId> pair : preferences) {
+				if (pair.getSecond().equals(t)) {
+					TransportId better = pair.getFirst();
+					Multiset<ContactId> m1 = contactConnections.get(better);
+					if (m1 != null) ids.addAll(m1.keySet());
+				}
+			}
+			if (LOG.isLoggable(INFO))
+				LOG.info(ids.size() + " contacts connected or preferred: " + t);
+			return ids;
+		}
+	}
+
 	@Override
 	public boolean isConnected(ContactId c, TransportId t) {
 		synchronized (lock) {
diff --git a/bramble-core/src/test/java/org/briarproject/bramble/connection/ConnectionRegistryImplTest.java b/bramble-core/src/test/java/org/briarproject/bramble/connection/ConnectionRegistryImplTest.java
index 3edf4ddc8..51da97ae2 100644
--- a/bramble-core/src/test/java/org/briarproject/bramble/connection/ConnectionRegistryImplTest.java
+++ b/bramble-core/src/test/java/org/briarproject/bramble/connection/ConnectionRegistryImplTest.java
@@ -4,6 +4,7 @@ import org.briarproject.bramble.api.connection.ConnectionRegistry;
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.contact.PendingContactId;
 import org.briarproject.bramble.api.event.EventBus;
+import org.briarproject.bramble.api.plugin.PluginConfig;
 import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.plugin.event.ConnectionClosedEvent;
 import org.briarproject.bramble.api.plugin.event.ConnectionOpenedEvent;
@@ -18,6 +19,7 @@ import org.junit.Test;
 import java.util.Collection;
 
 import static java.util.Collections.emptyList;
+import static java.util.Collections.emptyMap;
 import static java.util.Collections.singletonList;
 import static org.briarproject.bramble.test.TestUtils.getContactId;
 import static org.briarproject.bramble.test.TestUtils.getRandomId;
@@ -30,6 +32,7 @@ import static org.junit.Assert.fail;
 public class ConnectionRegistryImplTest extends BrambleMockTestCase {
 
 	private final EventBus eventBus = context.mock(EventBus.class);
+	private final PluginConfig pluginConfig = context.mock(PluginConfig.class);
 
 	private final ContactId contactId = getContactId();
 	private final ContactId contactId1 = getContactId();
@@ -40,7 +43,13 @@ public class ConnectionRegistryImplTest extends BrambleMockTestCase {
 
 	@Test
 	public void testRegisterAndUnregister() {
-		ConnectionRegistry c = new ConnectionRegistryImpl(eventBus);
+		context.checking(new Expectations() {{
+			allowing(pluginConfig).getTransportPreferences();
+			will(returnValue(emptyMap()));
+		}});
+
+		ConnectionRegistry c =
+				new ConnectionRegistryImpl(eventBus, pluginConfig);
 
 		// The registry should be empty
 		assertEquals(emptyList(), c.getConnectedContacts(transportId));
@@ -122,7 +131,13 @@ public class ConnectionRegistryImplTest extends BrambleMockTestCase {
 
 	@Test
 	public void testRegisterAndUnregisterPendingContacts() {
-		ConnectionRegistry c = new ConnectionRegistryImpl(eventBus);
+		context.checking(new Expectations() {{
+			allowing(pluginConfig).getTransportPreferences();
+			will(returnValue(emptyMap()));
+		}});
+
+		ConnectionRegistry c =
+				new ConnectionRegistryImpl(eventBus, pluginConfig);
 
 		context.checking(new Expectations() {{
 			oneOf(eventBus).broadcast(with(any(
diff --git a/bramble-core/src/test/java/org/briarproject/bramble/test/TestPluginConfigModule.java b/bramble-core/src/test/java/org/briarproject/bramble/test/TestPluginConfigModule.java
index 689d4c5bd..f081d887f 100644
--- a/bramble-core/src/test/java/org/briarproject/bramble/test/TestPluginConfigModule.java
+++ b/bramble-core/src/test/java/org/briarproject/bramble/test/TestPluginConfigModule.java
@@ -1,5 +1,6 @@
 package org.briarproject.bramble.test;
 
+import org.briarproject.bramble.api.Pair;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.PluginCallback;
 import org.briarproject.bramble.api.plugin.PluginConfig;
@@ -10,12 +11,14 @@ import org.briarproject.bramble.api.plugin.simplex.SimplexPlugin;
 import org.briarproject.bramble.api.plugin.simplex.SimplexPluginFactory;
 
 import java.util.Collection;
+import java.util.List;
 
 import javax.annotation.Nullable;
 
 import dagger.Module;
 import dagger.Provides;
 
+import static java.util.Collections.emptyList;
 import static java.util.Collections.singletonList;
 import static org.briarproject.bramble.test.TestUtils.getTransportId;
 
@@ -85,6 +88,12 @@ public class TestPluginConfigModule {
 			public boolean shouldPoll() {
 				return false;
 			}
+
+
+			@Override
+			public List<Pair<TransportId, TransportId>> getTransportPreferences() {
+				return emptyList();
+			}
 		};
 		return pluginConfig;
 	}
diff --git a/bramble-java/src/main/java/org/briarproject/bramble/plugin/DesktopPluginModule.java b/bramble-java/src/main/java/org/briarproject/bramble/plugin/DesktopPluginModule.java
index c00bd99d7..05e28499d 100644
--- a/bramble-java/src/main/java/org/briarproject/bramble/plugin/DesktopPluginModule.java
+++ b/bramble-java/src/main/java/org/briarproject/bramble/plugin/DesktopPluginModule.java
@@ -1,12 +1,16 @@
 package org.briarproject.bramble.plugin;
 
+import org.briarproject.bramble.api.Pair;
 import org.briarproject.bramble.api.event.EventBus;
 import org.briarproject.bramble.api.io.TimeoutMonitor;
 import org.briarproject.bramble.api.lifecycle.IoExecutor;
 import org.briarproject.bramble.api.lifecycle.ShutdownManager;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.BackoffFactory;
+import org.briarproject.bramble.api.plugin.BluetoothConstants;
+import org.briarproject.bramble.api.plugin.LanTcpConstants;
 import org.briarproject.bramble.api.plugin.PluginConfig;
+import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPluginFactory;
 import org.briarproject.bramble.api.plugin.simplex.SimplexPluginFactory;
 import org.briarproject.bramble.api.reliability.ReliabilityLayerFactory;
@@ -17,6 +21,7 @@ import org.briarproject.bramble.plugin.tcp.WanTcpPluginFactory;
 
 import java.security.SecureRandom;
 import java.util.Collection;
+import java.util.List;
 import java.util.concurrent.Executor;
 
 import dagger.Module;
@@ -24,6 +29,7 @@ import dagger.Provides;
 
 import static java.util.Arrays.asList;
 import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
 
 @Module
 public class DesktopPluginModule extends PluginModule {
@@ -61,6 +67,13 @@ public class DesktopPluginModule extends PluginModule {
 			public boolean shouldPoll() {
 				return true;
 			}
+
+			@Override
+			public List<Pair<TransportId, TransportId>> getTransportPreferences() {
+				// Prefer LAN to Bluetooth
+				return singletonList(
+						new Pair<>(LanTcpConstants.ID, BluetoothConstants.ID));
+			}
 		};
 		return pluginConfig;
 	}
diff --git a/briar-android/src/main/java/org/briarproject/briar/android/AppModule.java b/briar-android/src/main/java/org/briarproject/briar/android/AppModule.java
index b9e074897..d2dace83c 100644
--- a/briar-android/src/main/java/org/briarproject/briar/android/AppModule.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/AppModule.java
@@ -8,6 +8,7 @@ import android.os.StrictMode;
 import com.vanniktech.emoji.RecentEmoji;
 
 import org.briarproject.bramble.api.FeatureFlags;
+import org.briarproject.bramble.api.Pair;
 import org.briarproject.bramble.api.battery.BatteryManager;
 import org.briarproject.bramble.api.crypto.CryptoComponent;
 import org.briarproject.bramble.api.crypto.KeyStrengthener;
@@ -20,7 +21,10 @@ import org.briarproject.bramble.api.lifecycle.LifecycleManager;
 import org.briarproject.bramble.api.network.NetworkManager;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.plugin.BackoffFactory;
+import org.briarproject.bramble.api.plugin.BluetoothConstants;
+import org.briarproject.bramble.api.plugin.LanTcpConstants;
 import org.briarproject.bramble.api.plugin.PluginConfig;
+import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPluginFactory;
 import org.briarproject.bramble.api.plugin.simplex.SimplexPluginFactory;
 import org.briarproject.bramble.api.reporting.DevConfig;
@@ -48,6 +52,7 @@ import java.io.File;
 import java.security.GeneralSecurityException;
 import java.security.SecureRandom;
 import java.util.Collection;
+import java.util.List;
 import java.util.concurrent.Executor;
 import java.util.concurrent.ScheduledExecutorService;
 
@@ -62,6 +67,7 @@ import static android.content.Context.MODE_PRIVATE;
 import static android.os.Build.VERSION.SDK_INT;
 import static java.util.Arrays.asList;
 import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
 import static org.briarproject.bramble.api.reporting.ReportingConstants.DEV_ONION_ADDRESS;
 import static org.briarproject.bramble.api.reporting.ReportingConstants.DEV_PUBLIC_KEY_HEX;
 import static org.briarproject.briar.android.TestingConstants.IS_DEBUG_BUILD;
@@ -153,6 +159,14 @@ public class AppModule {
 			public boolean shouldPoll() {
 				return true;
 			}
+
+
+			@Override
+			public List<Pair<TransportId, TransportId>> getTransportPreferences() {
+				// Prefer LAN to Bluetooth
+				return singletonList(
+						new Pair<>(LanTcpConstants.ID, BluetoothConstants.ID));
+			}
 		};
 		return pluginConfig;
 	}
diff --git a/briar-headless/src/main/java/org/briarproject/briar/headless/HeadlessModule.kt b/briar-headless/src/main/java/org/briarproject/briar/headless/HeadlessModule.kt
index 5f622c83b..f1b354192 100644
--- a/briar-headless/src/main/java/org/briarproject/briar/headless/HeadlessModule.kt
+++ b/briar-headless/src/main/java/org/briarproject/briar/headless/HeadlessModule.kt
@@ -4,13 +4,13 @@ import com.fasterxml.jackson.databind.ObjectMapper
 import dagger.Module
 import dagger.Provides
 import org.briarproject.bramble.api.FeatureFlags
+import org.briarproject.bramble.api.Pair
 import org.briarproject.bramble.api.battery.BatteryManager
 import org.briarproject.bramble.api.db.DatabaseConfig
 import org.briarproject.bramble.api.event.EventBus
 import org.briarproject.bramble.api.lifecycle.IoExecutor
 import org.briarproject.bramble.api.network.NetworkManager
-import org.briarproject.bramble.api.plugin.BackoffFactory
-import org.briarproject.bramble.api.plugin.PluginConfig
+import org.briarproject.bramble.api.plugin.*
 import org.briarproject.bramble.api.plugin.duplex.DuplexPluginFactory
 import org.briarproject.bramble.api.plugin.simplex.SimplexPluginFactory
 import org.briarproject.bramble.api.system.Clock
@@ -33,6 +33,7 @@ import org.briarproject.briar.headless.forums.HeadlessForumModule
 import org.briarproject.briar.headless.messaging.HeadlessMessagingModule
 import java.io.File
 import java.util.Collections.emptyList
+import java.util.Collections.singletonList
 import java.util.concurrent.Executor
 import javax.inject.Singleton
 import javax.net.SocketFactory
@@ -88,6 +89,8 @@ internal class HeadlessModule(private val appDir: File) {
             override fun getDuplexFactories(): Collection<DuplexPluginFactory> = duplex
             override fun getSimplexFactories(): Collection<SimplexPluginFactory> = emptyList()
             override fun shouldPoll(): Boolean = true
+            override fun getTransportPreferences(): List<Pair<TransportId, TransportId>> =
+                singletonList(Pair(LanTcpConstants.ID, BluetoothConstants.ID))
         }
     }
 
diff --git a/briar-headless/src/test/java/org/briarproject/briar/headless/HeadlessTestModule.kt b/briar-headless/src/test/java/org/briarproject/briar/headless/HeadlessTestModule.kt
index e0e70fac2..4d4bee12c 100644
--- a/briar-headless/src/test/java/org/briarproject/briar/headless/HeadlessTestModule.kt
+++ b/briar-headless/src/test/java/org/briarproject/briar/headless/HeadlessTestModule.kt
@@ -4,8 +4,12 @@ import com.fasterxml.jackson.databind.ObjectMapper
 import dagger.Module
 import dagger.Provides
 import org.briarproject.bramble.api.FeatureFlags
+import org.briarproject.bramble.api.Pair
 import org.briarproject.bramble.api.db.DatabaseConfig
+import org.briarproject.bramble.api.plugin.BluetoothConstants
+import org.briarproject.bramble.api.plugin.LanTcpConstants
 import org.briarproject.bramble.api.plugin.PluginConfig
+import org.briarproject.bramble.api.plugin.TransportId
 import org.briarproject.bramble.api.plugin.duplex.DuplexPluginFactory
 import org.briarproject.bramble.api.plugin.simplex.SimplexPluginFactory
 import org.briarproject.bramble.network.JavaNetworkModule
@@ -19,6 +23,7 @@ import org.briarproject.briar.headless.forums.HeadlessForumModule
 import org.briarproject.briar.headless.messaging.HeadlessMessagingModule
 import java.io.File
 import java.util.Collections.emptyList
+import java.util.Collections.singletonList
 import javax.inject.Singleton
 
 @Module(
@@ -55,6 +60,8 @@ internal class HeadlessTestModule(private val appDir: File) {
             override fun getDuplexFactories(): Collection<DuplexPluginFactory> = emptyList()
             override fun getSimplexFactories(): Collection<SimplexPluginFactory> = emptyList()
             override fun shouldPoll(): Boolean = false
+            override fun getTransportPreferences(): List<Pair<TransportId, TransportId>> =
+                singletonList(Pair(LanTcpConstants.ID, BluetoothConstants.ID))
         }
     }