I would vote for any political party that would guarantee the introduction of safe-standing. It works incredibly well on the Continent yet an emotionally-charged pressure group (Hillsborough Family Support Group) can almost single-handedly stop that from ever happening. How is that fair? We've moved on a fair bit since the late 80s/early 90s...
They're not doing it single handedly. There are plenty still up for some fighting and trouble at football matches, which plays right in to their hands. Sure we've moved on but it still kicked off at plenty of games last season.
I'm not convinced it will even be that popular. Safe standing takes up a similar amount of space to seating so you'll most likely end up paying the same which will put a lot of people off.