I'm not an expert on disability options - and I can't think of anywhere where they have installed a double set of stairs in such a major public through fare, so this is not going to be a common problem.

However lifts are pretty common these days - network rail rightfully installed 2 of them in the station and I bet they only get used a few times an hour.
It has probably been forced on them and other companies by some pesky european rule or other, but surely we all agree it is the civilized thing to do?

The other benefit is getting a few more customers into the FH shops.
Once mums, the old and disabled get in their cars or on a bus instead, they are heading for the bigger shopping areas and are lost.

I seem to be a lone voice here, which probably says more about my ability of persuasion than anything else. I am not deterred!