If I understand correctly SVFR will shortly no longer be available in Class A airspace. A common European sky policy will come into effect in 2014 that will ban that facility.
You may well find that London TMA etc change to Class D so that SVFR
is still available but I understand that the same European directive will mean that SVFR traffic will need to be separated by 3000ft and 5nm from IFR traffic.