All the London railway stations :
I visited Dollis Hill station in July 2019. What an awfully inaccessible station. Lots of stairs.
Dollis Hill is on the Jubilee underground, and is not accessible to wheelchair users due to 25 stairs between street level and platforms. See pictures and further accessible transport in London detail from links below.
Dollis Hill exit from platforms via stairs
At the bottom of the stairs, there is a step-free crossing below the railway lines, not that this makes much difference!
The Chapter road exit from the bottom of the stairs at Dollis Hill
Underground lines : Jubilee
Accessibility friendly : Dollis Hill is not accessible to wheelchair users due to 25 stairs between the platform and street level.
General description :
More comment : Inclusive Britain Station Guide