Not all UK bound flights are leaving for 2E just yet. As discussed earlier, "Apparently, the flights to LHR, MAN, ABZ and BRS will be moved to 2E with the upcoming summer schedule. Flights to EDI, operated by CityJet, to SOU & NCL, operated by BritAir, would seem to remain in 2F2."

I will try to give the most current update early next week. The re-opening of 2E's main boarding area will take place at the beginning of the summer schedule, at the same time as the opening of LHR's T5A and T5B.