 Despite his success Urbanowicz was never popular at Polish headquarters and on 21 October he was forced to hand over command of the Squadron to Zdzisław Henneberg.During the Battle of Britain, he claimed 15 confirmed kills and 1 probable, which made him one of the top Polish aces (second only to Stanisław Skalski) and in the top ten Allied aces of the battle.Between 15 April 1941 and 1 June 1941 he commanded the 1st Polish Fighter Wing based at RAF Northolt, before being posted to staff work at No.