can anyone tell me how much for a adult fare to great yarmouth and return a week later in august for 1 person i have tried national express and they charge 52-70 but takes 10 hrs and train is approx 73-00

You'll probably find it cheaper to buy a ticket from Sheffield to Norwich (these can be as low as £15 each way if you book early enough) and then get a ticket from there to Great Yarmouth.

I find it much cheaper this way when I go to see my sister - if I buy a ticket directly to where she lives it costs a minimum of £60 by train :o