Quoted from G-BOAG :

B-777-200IGW w/Marconi IFE (small screen):
G-ZZZA/B/C; G-RAES; G-VIIA/B/C/D/E/F/G/H/*/J/K/L/M/N/S.

B-777-200 w/updated IFE systems:
G-YMMA/B/C/D/E/F/G/H/I/J/K/L/M/N/O/P; G-VIIO/P/R/T/U/V/W/X/Y.


This is the latest info I have for updated B-777 IFE.