Chris,
Page 169 of "The Last Blitz" (Mackay/Parry) has a photo of U5+DK with the "2" on the starboard fin.
The story of this aircraft and crew appears from page 166. This aircraft was engaged by AA fire and the crew bailed out, landing at Wembley, while the aircraft flew on to crash in allotments in Cambridge.
The picture did not scan well -
