The three at Thruxton are listed as owned by R A Short and "not converted and burnt at Thruxton October 1960. There were six altogether 'OCI to 'OCN - the others went to the Israeli Air Force in 1956.
RR299 crashed at Barton
RS709 is at the USAF Museum
RS712 is Kermit Weeks' aircraft
RS718, no info might htis have been RS715 which was with 3 CAACU at Exeter - parts of this are now with Tony Agar
TA719 is at Duxford with the IWM (via Skyfame)
TH998 is with the NASM at Washington
TV959 is with The Fighter Collection at Dxuford
Quite right, we do need another Mossie flying - I do hope TFC can bring theirs on fairly quickly, but as Beauman says, the other aircraft in the restoration queue need to be finished first!
Still not sure whether the two Mossies did fly with the Blenheim, but it was certainly Biggin '87 and all three aircraft would have been there. The Blenheim crashed a week or two later I think...