Just visited the lovely Qatar Airways London Heathrow Premium Lounge and wanted to share my experience with you.
Very new, excellent service, seatings, dining facilities and bar. The food offered and especially the drinks were better than those on board the plane, something which I find rare amongst the airlines. Example, from what I had, perfectly chilled champagne (Veuve Clicquot Brut), very fresh lobster and prawns, excellent cheese cake and macaroons. Dining facilities were split into two areas - the Brasserie and the Delicatessen area and the shower rooms are of a nice size with new fluffy towels.
If you are flying from Heathrow I would make an effort to go early and enjoy this lounge. IMO it's even better than the current Premium Terminal lounge at Doha.
Pictures of Qatar Airways London Heathrow Premium Lounge:
http://khun-pook.smugmug.com/Other/Q...5950689_3dZpKG