I reckon you would be ok with it. We had a very old chap with a walking stick and he went everywhere in the lifts while we used the stairs so I would think it would be fine. I'm sure customer services will be able to answer that definitively though.
I asked about that as I said that it didn't look intimidating enough for the opposition. In fact the whole route in for the away team is bland plain walls all the way to their dressing rooms. I think this needs addressing but we will see.
I went on the stadium tour today and I thoroughly recommend it to anyone. It lastsabout 2 hours and you get a real insight into the stadium (thanks Sean for the guided tour) and well worth the £10 pp. I'll post up a few pictures and maybe some more later.