diff --git a/features/FEATURE_BLE/ble/pal/SigningEventMonitor.h b/features/FEATURE_BLE/ble/pal/SigningEventMonitor.h
index bc6392c8be..5a299c68e3 100644
--- a/features/FEATURE_BLE/ble/pal/SigningEventMonitor.h
+++ b/features/FEATURE_BLE/ble/pal/SigningEventMonitor.h
@@ -17,55 +17,79 @@
 #ifndef MBED_BLE_SIGNING_EVENT_MONITOR
 #define MBED_BLE_SIGNING_EVENT_MONITOR
 
+#include "ble/common/StaticInterface.h"
 #include "ble/BLETypes.h"
 
 namespace ble {
 namespace pal {
 
+/**
+ * Implemented by classes that are reacting to signing events.
+ */
+template<class Impl>
+class SigningMonitorEventHandler : public StaticInterface<Impl, SigningMonitorEventHandler> {
+
+    using StaticInterface<Impl, ble::pal::SigningMonitorEventHandler>::impl;
+
+public:
+    /**
+     * Set new signed write peer counter.
+     *
+     * @param[in] connection connection handle
+     * @param[in] sign_coutner counter received from peer
+     */
+    void on_signed_write_received(
+        connection_handle_t connection,
+        uint32_t sign_coutner
+    ) {
+        impl()->on_signed_write_received_(
+            connection,
+            sign_coutner
+        );
+    }
+
+    /**
+     * Indicate that signed data was rejected due to verification failure. This could
+     * be due to an invalid CSRK key.
+     *
+     * @param[in] connection connection handle
+     */
+    void on_signed_write_verification_failure(
+        connection_handle_t connection
+    ) {
+        impl()->on_signed_write_verification_failure(connection);
+    }
+
+    /**
+     * Notify a new signed write cmd was executed.
+     */
+    void on_signed_write() {
+        impl()->on_signed_write_();
+    }
+};
+
+
+
 /**
  * Implemented by classes that need to be notified of signing events.
  * Notification is done by calling functions in the passed in event handler
  */
+template<class Impl, class EventHandler>
 class SigningEventMonitor {
+    Impl* impl() {
+        return static_cast<Impl*>(this);
+    }
+
 public:
-    /**
-     * Implemented by classes that are reacting to signing events.
-     */
-    class EventHandler {
-    public:
-        /**
-         * Set new signed write peer counter.
-         *
-         * @param[in] connection connection handle
-         * @param[in] sign_coutner counter received from peer
-         */
-        virtual void on_signed_write_received(
-            connection_handle_t connection,
-            uint32_t sign_coutner
-        ) = 0;
-
-        /**
-         * Indicate that signed data was rejected due to verification failure. This could
-         * be due to an invalid CSRK key.
-         *
-         * @param[in] connection connection handle
-         */
-        virtual void on_signed_write_verification_failure(
-            connection_handle_t connection
-        ) = 0;
-
-        /**
-         * Notify a new signed write cmd was executed.
-         */
-        virtual void on_signed_write() = 0;
-    };
-
     /**
      * Register a handler for singing events to be used internally and serviced first.
      *
      * @param[in] signing_event_handler Event handler being registered.
      */
-    virtual void set_signing_event_handler(EventHandler *signing_event_handler) = 0;
+    void set_signing_event_handler(EventHandler *signing_event_handler)
+    {
+        impl()->set_signing_event_handler_(signing_event_handler);
+    }
 };
 
 } // namespace pal