First the good news, the project is on time and on budget.
Now the bad news, the spec was issued in 1998, and the air tanker consortium chosen as the preferential bidder. Then due to Government incompetence and their insistence on a private finance initiative, it took 9 years before the contract was signed and work commenced. The result of this is that the RAF will receive 14 tankers designed for the perceived threat in 1998, whuch as a result will not have the appropriate defensive aids to enter Afghanistan. These will then have to be retrofitted, and the worn out Tristars will have to soldier on a little longer.
The PFI system has been notorious for huge add on costs for specification changes. As the supplier has a long contract to both provide and support, thus they can charge almost what they want for any alterations. We have regularly heard of municipal buildings being charged £100 or more for a coat hook. It appears that this will be little different