Originally Posted by JDiver

It doesn't appear that the T-5 Hilton is replacing the old T-4 Hilton - they are both available. Well, the T-5 is available "This hotel will soon be joining the Hilton Worldwide Portfolio of Brands and is presently accepting reservations for arrival September 14, 2011 and beyond." We've booked it for two stays in October when we will be using T-5 and leaving some "buffer" time for connecting flights (making BA SFO-LHR-SFO and LHR-ATH, adding MK MLA-LHR made the trip ~$1,000 cheaper).

Hilton London Heathrow Airport Terminal 5
Poyle Road Colnbrook SL3 0FF, United Kingdom
Telephone 44 1753 686860

• Just minutes from Heathrow Airport Terminal 5 – connected by regular bus transfers
• 30 minutes from central London by train
• Executive Lounge and business centre
• 24 Fitness Centre and luxury Spa with sauna

(Claim is Hotel Hoppa bus or hotel shuttle available, iirc.)