Surprised no one has mentioned about the RVP at Manchester, I know the charges are contentious to people who want these facilities for free however it is a damn fine facility for watching the aircraft. So to say the facilities are poor in the UK may be true at many airports but not all. In addition there is the Airport hotel and may other unoffical spots.
The facilities can still be had "for free", arrive on public transport or walk in. Charges only apply to drivers and their passengers........
Planemike