VC-10s are tasked with air to air refueling now, as well as troop transport, (the original 10 sqn ones built new for the RAF that is, the converted airliners of 101 sqn have always been pure tanker/transports, but the 10 sqn birds were also fitted for AAR
in the early 90's.).
If security is a real issue, a 10 sqn VC
-10 might still be used, as they have IRCM countermeasures and military crews. The last time was in 2001 when Blair went to Pakistan just after the Taliban fell.
Currently the VC
-10s are to stay until 2007-09.
Usually on a BA
aircraft, Blair will go in 1st, journalists down the back.
VIP kits on BA
aircraft have been used for Royal flights, not when carrying the PM