Catching up (rather belatedly, for which I apologise) with this topic here:
I, too, doubt that they will ever be 'fully accessible'.
Using Nailsea & Backwell station as my local example: here we have a rather steep slope up to platform 2, but that has to be accessed from some distance along the road, Station Close.
There is no disabled access slope up to (or down from) platform 1. There simply isn't anywhere to build it, on the embankment below our elevated station.
The solution would be to build a new set of lifts - but that was last costed at around £1million, so that isn't ever going to happen, purely for the 'cost benefit ratio' numbers.
Chris from Nailsea.
