Welcome to the Community, I'm very sorry to learn about the problems you're experiencing with your iPlayer service at the moment.
We're not experiencing any national issues with iPlayer freezing so I've located your account to run some tests on the set top box from our end for you. There;'s currently an issue in your local area affecting the interactive services on your TV service (reference C00751957).
The team are working hard to get this resolved and expect some action to be made by later today. If you're still experiencing this issue from tomorrow morning, get in touch and I'll take another look for you right away.
Apologies again for the inconvenience caused, we're looking forward to hearing from you.