[vidarh]

Generally the criteria is that clinical needs go first, so if someone needs a room, they'll chuck you right out again (and not charge you), which is fair enough, but also a reason for them not to create a too high expectation or demand.

Overall the NHS trusts have quite a bit of latitude in carrying out private services to offset costs by increasing utilisation of facilities and equipment (private surgeries are often carried out in NHS operating rooms, for example), but the extent to which they take advantage of it varies quite a bit.