Read this morning that 'Z Car' G-ZZZA re-entered into service yesterday to Newark with with New First and upgraded Business, Premium Economy and Economy cabins and THALES IFE.
Good news for those regularly tramping to ME and US East Coast.
BA Source not conclusive but ft dashboard shows as returning refurbished on 28th April:
http://ftdashboard.net/fleet/b772.htm
G-ZZZB has just positioned down to Cardiff over the weekend for (hopefully) the same treatment meaning all the 'Z cars' will be as good as new by early summer.