Oh! What an ass I am!
Thank you to Ponita , Scarlet, Andrew and all who tried to solve my problem when I couldn't get my keyboard to do more than 8 numbers on the trot. It wasn't the fault of the magazine whose subscription form, for a year's supply, I was trying to complete , it wasn't an ageing keyboard it was all down to me.
I buy books all the time on line, sometimes clothes and other things and always I have to enter my credit card numbers. This time I had to enter my sort code and Sheila, my help, told me what that was, but it was only when my son went through the motions himself that he discovered it was my Bank account number they required - not my debit card. Which is weird becaus it was a special price for debit card users. All is well now, except they say it could be up to 6 weeks before I get the first magazine. Serves me rigjht I suppose.
As they used to say at school - read the questions!