If you clicked the link I posted above...
London Heathrow Terminal 2: Our new home from 17 September 2014
We are pleased to inform you that from 17 September 2014, Singapore Airlines will be moving our operations at London Heathrow Airport to the new Terminal 2: The Queen’s Terminal.
As a valued member of the Solitaire PPS Club, you will continue to enjoy First Class check-in services at our dedicated check-in counters located at Zone A. As we are currently adding the finishing touches to our brand new SilverKris Lounge in Heathrow Terminal 2, we have made alternative lounge arrangements for our Solitaire PPS Club members. Our check-in agents will advise you on the lounge to proceed to before your flight.
We are currently making plans for an arrival lounge service at the new Terminal for our Solitaire PPS Club members arriving on SQ306 or SQ322. Meanwhile, the Virgin Atlantic Revival Lounge in Terminal 3 will still be available for your usage should you wish to freshen up before you leave the airport. Our check-in agents will advise you on the lounge to proceed to before your flight.
For more information on Heathrow Terminal 2, please click here.
Thank you for your continued support, and we look forward to welcoming you soon at London Heathrow Terminal 2: The Queen’s Terminal.
1. You CAN still use the Virgin Revivals lounge if you arrive on SQ306 or SQ322. You'll have to make your way to Terminal 3, however.
2. They're planning to set up their own arrivals lounge in terminal 2, so this is "due to be changed" and they have not "simply taken this part of the offering away". However, I wouldn't expect the arrivals lounge in T2 for at least another year or so, albeit this is pure speculation on my part.