Here are a few updates to be added to the wiki post
Aircraft fitted with WiFi

G-BYGA - Returned from CWL 27JUL
G-BYGE - Returned from CWL 05AUG
G-VIIE - Returned from SNN 13AUG
G-VIIJ - Returned from CWL 03AUG
G-YMMF - Returned from CWL 17JUL

Aircraft confirmed as not fitted with WiFi

G-CIVD
G-VIIN

Aircraft currently undergoing WiFi fitting

G-VIIF - Arrived in SNN 13AUG
G-VIIL - Arrived CWL 03AUG

G-VIIL is expected to return from CWL 16AUG. G-VIIM expected in CWL same afternoon.