Hi,Yes they do ring sometimes asking for bank details and weather you've been in hospital recently is another questions they've been known to ask. Usually it's not long after this that your back pay will be in your bank.
No worries. Some Tribunal awards have end dates, if this is what your is then you will be contacted 3 months before the award is due to end. If it doesn't then you'll have a review 1 year before. You'll need to check your award letter, when you receive it from DWP.