Well, Uxbridge-ish. Right by Swakeleys RAB to be exact, so I would join the Uxbridge road by going down Park Rd and then up Hillingdon Hill - I know exactly what you mean. Only ever cycled as far as Hillingdon Cycle Circuit, so after that is new cycling territory for me.
There is a barely used bike path along the south side of the A40, all the way down to the Polish War Memorial.
Up over the hill past the Dinosaur Golf to the (closed) White Hart rab, then Ruislip Road. Bus lane in places, new shared bike lane from Greenford traffic lights to West Ealing.
Well, Uxbridge-ish. Right by Swakeleys RAB to be exact, so I would join the Uxbridge road by going down Park Rd and then up Hillingdon Hill - I know exactly what you mean. Only ever cycled as far as Hillingdon Cycle Circuit, so after that is new cycling territory for me.