I have just been given new information on the debit problem that hit more than 700,000 Nationwide customers. The building society says the problems are fixed, in other words money that had been wrongly taken out of accounts has been returned overnight.
I also have new information on how this glitch happened in the first place. So far Nationwide has called this a "human error", now I have learned that it was a keying error. In other words inputting debit information to the computer systems. It seems not to have been a computer system error.