TSB customers in Oxfordshire may have had a shock when they logged into their online accounts this weekend. 

The bank has apologised after reports some customers saw their accounts credited with thousands of pounds, while others were unable to access their money online at all. 

Oxford Mail: TSB Logo

The issues on mobile and online accounts took place after a system upgrade.

One customer said they suddenly had 'access' to other customers' accounts totalling more than £20,000 and another reportedly discovered they had been credited with £13,000 after logging back in.

Meanwhile a number of customers complained that they were still unable to access their money on Monday morning.

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The bank had told its account holders that some of its services, including online banking, making payments or transferring money, would not be possible over the weekend.

The upgrade window was scheduled between Friday at 4pm and Sunday at 6pm.

However a message on the TSB website this morning said there were still 'intermittent issues' with its mobile and internet banking services.

The bank said it was "working as hard and as fast as we can to get these up and running".

TSB's social media team faced a stream of complaints from customers, including several who said they could see other people's accounts after logging back in on Sunday evening.

Craig Malcom tweeted: "@TSB I currently have access to £20k+ of other peoples money.

"I suggest somebody answers the phones as iv been on hold for 45 minuets!

"This is a MASSIVE breach of data protection! If i have access to their account they could have to mine as well!"