Summary- you are the Germans, and you have orders to neutralize the British forces near Kent county. YES, the RAF is still present. You have been given some flak guns, including a prototype Wirbelwind.
Build a barracks, and spam grenadiers. Send them to the enemy base and neutralize the airfields and HQ. Then, capture the armor base and neutralize any remaining armor with your Panzer III's. once you do that, you can wait for the Red Devils to come or just neutralize the supply depots. Don't use the Wirbelwind in your attacks, as it will be destroyed by Typhoons.