All the London railway stations :
Underground lines : Piccadilly, Metropolitan
AccessAble Access Guide :
Accessibility friendly : Metropolitan line eastbound towards Liverpool Street (A step 277mm/gap 37mm), westbound towards Uxbridge (A step 243mm/gap 40mm). Piccadilly line eastbound towards Oakwood (B step 183mm/gap 87mm), westbound towards Uxbridge (A step 177mm/gap 83mm).
There is Lift access between street and platforms. There is interchange between Underground Lines by lifts to street level and down again in additional lift.
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Inclusive Britain Station Guide