TEF6686 FM-DX: 90.0 BBC Radio 2, Dover (Swingate) tropo duct

Rare reception of the Dover Swingate transmitter site at my location (Western end of Germany) QTH grid square locator JO31DF.
Indoor reception on a TEF6686 portable receiver, connected to a telescopic whip antenna. One of the closest UK transmitter sites at 348 km, however only emitting a estimated max 1 kW ERP or less into my direction (and towards Benelux, France), as this transmitter uses a very directional antenna pattern (max 11 kW ERP).