Actually access to the CH changed this year. Its commonly thought the change was made because nobody (including myself!) who was flying SQ would use the very average KF lounge and so there was a mass migration to the CH. This stopped all that.
From 1 May 2009, as a part of an agreement with Virgin Atlantic, access to SilverKris Lounges and Virgin Atlantic Clubhouses will be based on the airline operating the flight that our members are traveling on.
SilverKris Lounge access is available to Flying Club Gold members only when they travel on a flight operated by Singapore Airlines. Likewise, Clubhouse access will be available to PPS Club and KrisFlyer Elite Gold members when they take a flight operated by Virgin Atlantic (i.e. if the aircraft is operated by Virgin Atlantic).
Solitaire PPS Club and Life members will continue to enjoy the services of Virgins Revivals arrival lounge in London when they travel on SQ322 to London.