Bryan Morris wrote:
Thanks. I tried everywhere including Tfl website to find out but there
doesn't appear to be anything published explaining this.

I agree it's all a bit buried but for the record
https://tfl.gov.uk/transport-accessi...voiding-stairs
has:

"Step-free access means lifts, ramps and level surfaces so you don't
have to use stairs or escalators, and can avoid the step and gap onto
our trains, buses and boats."
and later continues
"Some step-free stations still have a gap and step between the platform
and the train. The Tube map shows which Underground, Overground and DLR
stations are step-free. The blue symbol shows step-free access from
street to train and the white symbol shows step-free access from street
to platform. "

There's also the step-free tube guide
https://tfl.gov.uk/cdn/static/cms/do...-guide-map.pdf
which gives a guide to the *sizes* of the steps and of the gaps between
platform and train - helpful for those to whom a gap 7 inches feels
like "one giant leap".
--
Robin
reply to address is (meant to be) valid