Originally Posted by chevvron
There is also an implication that Radar Advisory Service may only be provided in class F airspace (sections 8.11 and 9.1.4)
It says that an Air Traffic Advisory Service
may be provided to IFR flights in class F airspace. It doesn't say "only". ICAO doesn't recognise the Radar Advisory Service as such -- I don't think the UK's RAS is intended to meet the ICAO definition of an Air Traffic Advisory Service.