So now, at extremely short notice, I have to find out whether any of the other venues are accessible, and book trains and possibly accommodation. The best bet is Wolverhampton Slade Rooms, which I've been to before, but none of the usual ticket sites are listing tickets for the gig (sold out?). The second best bet is Southampton Joiners, but I can't find out if it's accessible online. (The site which says it is also gives contact information for a completely different venue. Argh).
* the hair metal band, not the porn star.