PN
I'm not sure if the Wikipedia entry is entirely correct; it implies that the contract with Airtanker has already been signed. However, this was the last progress report that I saw from the MOD:
6 June 2007
New RAF tanker and transport aircraft programme approved by MoD
"The Ministry of Defence and AirTanker Ltd will now work together to secure financial and contractual close on a PFI deal as quickly as possible."
Have I missed something?