Post #5 in this thread gives you the answer.
http://forum.12oclockhigh.net/showthread.php?t=37486
The unit didn't move to France until 4th September 1940, so could not have taken part in the Biggin Hill raid of 30th August.
Douglas Dildy also says II./LG 2 took part in that raid in his book 'Battle of Britain 1940, The Luftwaffe's 'Eagle Attack'. I will not make comment on the contents of that book.