United first airline from LHR T2
I just completed two trips involving UA T2 arrival to T5 IB. Then T5 IB to UA T2. As others have stated, transferring TO T2 is a massive walk. It was all rather ridiculous with boarding pass in hand but having to go through document inspection and a second giant walk to the United Club. At least 15 minutes. A bit of a ghost town at the moment, obviously but it's filling up (Aer Lingus just moved in).
United Club LHR T2: Where. On. Earth. Am. I. This. Cannot. Be. A. United. Club. !!!
Seriously, it's excellent. No dragons in sight - friendly greeting upon entry. I heard them turn away a Priority Pass holder for he had the wrong card but it was politely and respectfully done.
Inside the decor is beautiful - there's ample non alcoholic drink stations, the bar is actually beautiful and the food are offered great options including sandwiches, pasta, etc. Well done UA on this investment; I'm still a bit shocked!