All the London railway stations :
Underground lines : Metropolitan
AccessAble Access Guide :
Accessibility friendly : Northwick Park is not accessible to wheelchair users due to stairs between the platform and street level.
You can change between northbound towards Harrow-on-the-Hill (A step 203mm/ gap 77mm) and Metropolitan line southbound towards Liverpool Street (A step 227mm/ gap 60mm) – use this to change between trains on Uxbridge line and trains towards Pinner, for trains towards Amersham another change at Harrow on the Hill is needed.
General description :
More comment : Inclusive Britain Station Guide