I know this is an old thread, but Currys / PCWorld have the TabPRO 10.1 for £199 at the moment. I know because I just bought one. Well chuffed with it too.
I've just purchased a Samsung Galaxy Tab Pro 10.1 and have exactly the same problem. I've gone through the process of restarting the router, restarting the tablet, Aircraft mode on and off but the problem persists. Any more ideas?