You have indeed identified it as Serial No 25071, however it is not a Focke-Wulf it is the Bucker Bu 181 Bestmann before restoration as I am sure you know.
Glenn Lacey purchased and operated the aircraft in the UK from 31st May 2003 to 31st May 2004 under its German Registration D-EDUB. In June 2004 the German registration was cancelled and the aircraft re registered as G-GLSU.
You have control
http://www.rlm-aviation.co.uk/bu181_history.php