We don't get it free here either. It's part of an additional cost cable package.
PBS in our area does show quite a few British shows, but it's a bit like BBCA where the majority are older shows. The weird thing is they just randomly show one episode of some shows for no apparent reason. They showed an episode of Dr. Who the other day, just one episode, and it's not on their schedule and doesn't seem like they'll be showing it again. Makes no sense, but it's a nice surprise when I happen to catch something not normally shown here.