[Pieter H]

All,

The Hurricanes that came down on May 11 were (see e.g. 12 Days in May)

N2547 Hingene Sqn Ldr Tomlinson, returned to UK May 13
N2403 (Numansdorp) Flt Lt Michael Donne, crashed, KIA
P2758 (Dordrecht) Sgt John Luck, baled out, PoW
N2405/Y (Gravedeel) Plt Off George Slee, crashed, KIA
N2407/N (S Dordrecht) Plt Off Cyril Hulton-Harrop, baled out, PoW

I think it is pretty clear now that the presumed claims for 17 Sqn losses on May 13 are all related to the what happened on May 11:
N3403 is a typo for N2403 as already suggested by Alex
N2405 and N2407 are confirmed May 11
N2454 can only be a (serious) mix-up with the N2547 of Tomlinson.
In other words: no 17 Sqn Hurricane losses on May 13 until proven differently.

Thanks to all for your inputs.

By the way; the crew of the Hs126 that crashed at Piershil was Fw Lindner (pilot) and Lt Franke (obs), both killed in the crash.
On the 2nd Henschel I only have that the crew baled out safely over german occupied territory around Waalhaven, but that would exclude Oude Tonge.

Pieter