Update: London's Oyster card system fails again

London’s Oyster card system used on public transport has suffered another failure, just two weeks after it crashed wiping the cards of 40,000 travellers.

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London’s Oyster card system used on public transport has suffered another failure, just two weeks after it crashed wiping the cards of 40,000 travellers.

The problem this morning (25 July) hit pay as you go card users on London’s underground.

Transport for London is keeping open barriers at stations until the fault has been rectified.

In a statement TfL blamed its supplier Transys for the fault. "We believe that this problem, like the last one resulted from incorrect data tables being sent out by our contractor, Transys,” said TfL.

Transys refused to confirm the cause cited by TfL, but did say, "the problem has been identified and our immediate priority is to get the system back up and running. Steps are being taken to ensure that this does not happen again and we will undertake a full root cause analysis."

TfL said, "Cards are not being disabled and we will automatically refund any passengers who may be charged the maximum £4 fare as a result of not being able to touch in and out at the beginning and end of their journeys. Oyster card holders need take no further action.”

About 17 million cards have been issued since the introduction of the Oyster system in 2003, according to TfL.

TfL and Oyster card face further problems with after a Dutch judge ruled that security researchers could publish details of how to exploit a flaw in the Oyster cards.

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