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Two glitches that hit the London Oyster travel card infrastructure cost Transport for London more than a million pounds, a spokesperson confirmed today.

Two glitches that hit the London Oyster travel card infrastructure cost Transport for London more than a million pounds, a spokesperson confirmed today.

Transport for London (TfL) wants Oyster supplier TranSys to compensate for the losses incurred when two glitches hit the system in July.

"TranSys should meet these costs rather than TfL or the ratepayer," the spokesperson told Computerworld UK.

The Oyster card system suffered two major outages on 12 July and the 25 July.

In the first outage, 72,000 cards were corrupted, almost double the original reported figure of 40,000. Around 48,000 customers were over-charged. TfL said it has refunded all affected customers.

The TfL spokesperson said TranSys has blamed tests that were being carried out over the system for causing the glitch. But no one from either the supplier or TfL was able to explain to Computerworld why there was no fail over system in place.

The second glitch, on 25 July, was the result of two sets of data tables being sent by TranSys which "conflicted with one another," explained the TfL spokesperson.

The TfL board, which is chaired by the Mayor of London, met on 30 July to discuss the outages, where TfL Commissioner Peter Hendy told the board the resulting loss of revenue was more than £1m.

A week later, 8 August, TfL announced it planned to terminate its £100 million per year contract with TranSys. But the spokesperson denied this decision was driven by the outages, and insisted it was purely a cost cutting measure.

TranSys, a consortium made up of four global companies Electronic Data Systems (EDS), Cubic Transportation Systems (CTS), Fujitsu Services and WS Atkins, directed all media queries on the outages to TfL.

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