Revolution, Dexter, Arrow, Breaking Bad, Supernatural, Sons of Anarchy, Boardwalk Empire, Fringe, True Blood - and plenty more.
I can understand it when the UK run is just a couple of weeks behind the US, but some of these don't even have a UK air date.
The enforcement of this rule seems haphazard at best. It seems to depend whether a mod watched the particular show. Some consistency either way would be useful. An optimal solution would be to have "UK run only" threads for shows which are currently running in the UK.