I suspect it's probably a random setting (in the TV or broadband connection) that I have that is causing it, if anything - though I've done hard resets and the issue is still present.
I don't know the model number, though I will find out tonight to warn people off! It's about 2-3 years old.
(This is backed up by a good few threads on AV forums with the same issue - we fucked it basically for assuming it would resolve itself, and should of taken it back to the shop whilst we could)
Every few weeks I sit down and consider I must have something wrong, and got to town on Google, AVForums and the settings, and try every suggested solution, though it never changes.
For example, I press 'guide' and in about 45 seconds the guide (in Youview) comes up, then another 15 seconds before the actual program guide is populated etc. All the menus are a permanent go-slow.
AND the default position for all menus is bonkers. I boot up Youview (when I CBA to watch anything proper), and it takes me to some shitty 'Choice' section that supposedly gives me a guide as to what it suggests I watch (further requiring a send/receive data stream to the internet to update this selection). Its takes about 60 seconds to 'back back back' my way out of it and watch the damn TV. Urgh!