Luftwaffe Fighter Claims - 27 July 1940

[Peter Cook]

I am trying to establish the validity of two claims for 27 July 1940. The first is by Hptm Erich Gerlitz of 7/JG27 for a Hurricane shot down at 16.35 at an unknown location. This is listed in Tony Wood's OKL Combat Claims Lists and in Brian Cull's Battle for the Channel.
The second claim is for Oblt Roloff von Aspern of 5/JG54 for a Hurricane shot down 'W London' at 10.20, reproduced in Mathews and Foreman's Luftwaffe Aces, Biographies and Victory Claims.
I can't match either of these with any known actions on this day or any Hurricane losses. The only Hurricane that was lost was flown by F/L Cox of 501 Sq., who was shot down over Dover by Lt Marx of 3/Erpr.Gr.210 at approximately 17.50.

Any thoughts?