I was quite surprised to see the Oxford Ice Rink listed among the best loved buildings in Britain, I suppose it's easy to take it for granted when you see it all the time. I haven't been inside it for years but the impression I get when passing is that it really needs a good clean up, it's looking a bit shabby now (the masses of Chavs that gather around it don't help).
It was designed by Grimshaw Architects, they have a pretty impressive portfolio. The page relating to the Ice Rink is here.