Biggus is of course correct but I'd suspect the MoD's creative accounting to blur any lines and therefore make it impossible to see the true cost of either element (capital cost vs through-life).
The same happened with the MRA4 where costs were extracted from the through-life 'guesstimate' to enable the ever-growing purchase cost to be met. Classic example was the sims. Originally all manning and course prep was included in the 'life-cost' , then removed, so we blue-suiters had to pick up the gaps in short-order before the OCU started.
I fear these issues (accounting fudges) will have a far greater impact on any possible purchase than what may actually be the best tool for the job. As others have said, the clock is ticking and no sign of any tender on the table.....