I am at a loss to understand why refitting an aircraft should cost £10M.
One might allow that there would be a VVIP fit for a modest number of senior persons but then the rest would be accommodated at most in a 'Business Class' environment. Since this last fit is readily available for commercial customers why the massive costs.
One might accept that there would be a requirement for added comms and security equipment but it seems to be over-egging things a tad!
Furthermore, I can see the jet being rapidly put back to a tanker/pax aircraft - oh yeh. The next thing of course is there would need to be a spare!
Old Duffer