London's transport network took a massive hit yesterday after an IT error left travellers without the use of the Circle Line for several hours.
The underground line was closed for the entire morning rush after computers used to control signals, dating back to the 1980s, were found to have burnt out.
Although some of the line was up and running again quickly, many parts remained suspended for the rest of the day.
Delays were still troubling commuters this morning on the line, with suspensions between Mansion House and Liverpool Street stations.
Transport for London (TfL) claimed today's problem was down to a new fault and everything was back in working order by midday.
"Our engineers worked through the night to repair the problems which caused yesterday's suspension but a new problem developed this morning," a TfL spokesperson told IT PRO.
They added: "The bottom line is that it's exactly these kind of antiquated assets that we're seeking to replace with the upgrade programme we're carrying out at the moment."
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