The was quite a while where iPlayer was covered by their law, there was another loophole where if your watching it on an untethered device (on a battery with wifi) that wasn't covered either, but I'm not sure now...

The whole law is antiquated, now you don't need them or their transmission equipment. I do believe that if they move to a subscription model they will lose many customers, especially those with Netflix etc (I don't even know if the aerial cable in my flat works or even own a tv, I use a 43" monitor if I do want to watch anything).