We had a similar agreement with a nearby military unit until early this year.
The difference being that the MOD paid us to have our bods on console there, this being considered to be the safest option given the adjacent nature of our two units.
The annual costs at the end of the contract worked out at about £98K per year.
If HIAL have been getting the services of Lossi' for nowt all these years, they're in for a big suprise - my man on the inside at the RAF dept' of deals tells me that the MOD bean counters are looking closely at the contract we had, in anticipation of presenting HIAL with the harsh facts of commercial reality.