G-OMED became G-OCAZ in May 1995 and was written off in 1996 following a mid-air with a glider.

OY-BTZ Piper PA-31-350 Navajo Chieftain c/n 31-7752031

M-YAIR Raytheon 390 Premier 1A c/n RB-146

CS-UQR Aerospool WT-9 Dynamic c/n DY244

What the 1922 means, I don't know, sorry!

N590EU Beech 350 King Air c/n FL-590

CS-PBN PZL-Swidnik PW-5 Smyk c/n 17.09.021

However, this was involved in an accident in 2003, and hasn't been registered again since. Whether this is what you saw, I don't know.

EC-HGS Airbus A319-111 c/n 1180

This was the "RAF Halton at Home" event, with the Sunday also being a Tiger Moth fly-in.

G-ANCS De Havilland DH.82 Tiger Moth c/n 82824

However I can't find any others, nor a report from that day

N203SB Piper PA-31-350 Navajo Chieftain c/n 31-7852095

This is the only airframe out of all those possibilities that has been in Europe.

G-HBBC De Havilland DH.104 Devon C2/2 c/n 04211

G-CKCZ Schleicher ASK-21 c/n 21749
G-DDJK Schleicher ASK-18 c/n 18030

F-GTJP Robinson R-44 Astro c/n 0590

This was registered at the time and there's pictures online of it at Rennes, would suggest you've logged the type wrongly

EC-JFA Schempp-Hirth Ventus b/16.6 c/n 153

G-DUOX Schempp-Hirth Duo Discus c/n 474
G-DIIA Schempp-Hirth Discus-2A c/n 196

Can't help with the others I'm afraid

G-CPEM and G-BPEK, both BA 757s?

G-CO_B could be one of three:

G-COMB Piper PA-30-160 Twin Comanche B c/n 30-1362 (owner in Isle of Man)
G-CONB Robin DR.400/180 Regent c/n 2176 (owner in Kent)
G-CORB Socata TB-20 Trinidad c/n 1178 (owner in Salisbury)

D-GATE is likely a mispole, it wasn't registered at the time.

HA-YAG Tekhnoavia SM-2000P c/n 05-36 (originally a Yak-18)

BGA2000 Glasflugel 201B Standard Libelle c/n 585 to G-DDCC 15/Oct/2007.

ZS-SPE arrived 0815 as SAA230

ZK-SUH operated ANZ001/002 on this date.

C-GHLM Airbus A330-343X c/n 419 is fleet number 938