I have some information but I'm not sure it helps you - the deaths of the five airmen found near Holyhead were registered there as follows:
Holyhead 2A P88 439: 20 Aug 1942, Dead body found off South Stack - J. Jarns, 25, Sergeant RAF No 304 Polish Squadron, (No P792047), c.o.d - Accident (due to war operations). Certificate received from D.A. Clarke P.O. for officer commanding RAF Valley.
Holyhead 2A P88 440: - Antoni Zielowski, Pilot Officer, (No P1954), other details as above.
Holyhead 2A P89 441: - Ludwick Ruszel, 28, Sergeant, (No P794191).
Holyhead 2A P89 444: 9 Sep 1942, Dead body found near Trearddur Bay - A. Tychalis, 20, Sergeant (P794730).
Holyhead 2A P90 446: 15 Sep 1942, Dead body found near Trearddur Bay - Leszer Wasilewski, 34, Flying Officer, (P0795).
I doubt whether the Polish names are transcribed correctly.