Then again (and I point out I don't wish to offend anyone), the nature of a disability is exactly that, a disability. A less able bodied person than what is considered "normal". Unfortunately, the draw-back with having a disability is that you will more than likely not be able to lead what is considered a "normal" life.
I just don't think spending billions of pounds, creating months of inconvienence and ruining victorian architecture is worth it for (in the grand scheme of things) a minority of people. I'm not saying projects from now on shouldn't give consideration to people with disabilities of all kinds, but some things just can't be done. Yes, it's not fair, but unfortunately that is the nature of having a disability.
Somebody, somewhere will always be discriminated against.
A good example of this is supermarkets. Surely, as someone who would say they are not disabled (although I wear glasses, which I could say is a disability) and who doesn't have any children, that means I am not allowed to park close to the supermarket entrance. So, because I do not have any children and am not disabled, I am discriminated against. It's all swings and roundabouts, but like I say, somebody, somewhere will be on the crap end and that's just the way life is.
There has to be a line somewhere between supporting the needs of minorities and anti-majoritarianism. Lifts and level-access platforms are useful to many people (although having just come back from France, there's work to be done there - 3ft climb to board a train). However, where is the line between a disabled-access toilet cutting out a few seats and a ramped footbridge replacing a Victorian one?