Sainsbury's sorry for fuel mix-up

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Sainsbury's has apologised after unleaded and diesel fuel were put in the wrong underground tanks at one of its filling stations in Oxfordshire.

Twenty customers have so far come forward complaining they had put the wrong fuel into their vehicles at the Wantage site on Wednesday.

Sainsbury's blamed its suppliers for the error and said customers would be reimbursed for the inconvenience.

Anyone else who has been affected has been told to contact the supermarket.

In a statement the store said: "We did experience a technical problem at our Wantage petrol filling station.

"All customers have now been contacted and are being fully reimbursed.

"We would like to apologise for any inconvenience caused."

The AA said it can cost up to £3,000 to have engines cleaned if the wrong fuel is put in.