Jim put it this way-at the secret Oxon base there are 2 individuals who do nothing but audit claims.Regardless of their previous employment they would not be needed in a rates system. As for the Cap, when the military changed to actuals we followed the civil servants rules ie reasonable actuals etc. Then all of a sudden our claims were subject to a limit in the case of the UK £25 . Not only that CG at HW (civil servants ) go out of their way to try and ensure you can't even spend that. The MOD limit bit is a direct quote from said organisation.
I take your point about London I just doubt we have the money to invest!