Old trains which were blamed for the daily disruption when Transport for London (TfL) took over from Greater Anglia, were inspected, it has been confirmed.

Since May 31 when West Anglia routes from Liverpool Street to Chingford, Chestnut and Enfield Town became part of London's Overground network, commuters have complained of delays, cancellations and short trains during peak times.

TfL's director of London Overground (LO) Mike Stubbs blamed technical issues with some of the 30 year-old trains inherited as the root cause for rail chaos experience by thousands in the last six weeks.

Today, MP Iain Duncan Smith met with TfL's director of rail Jonathan Fox at Chingford Station to outline his constituents' concerns.

Mr Fox, said the number of trains which run on time has climbed from 89 per cent to 92 per cent, but it is still falling short of the 94 per cent rate when the routes were part of Abellio Greater Anglia.

He also admitted that TfL have learnt from their lesson of trying to run a train service when the stock is not up to standard.

"It’s a story of improvement over time," he said.

"We were able to some improvements with Abellio at Enfield Town but weren’t really able to get much access to the trains before May 31 because they were still operating the service.

"We did get to inspect them, could we have found out the problems, we could have done, and perhaps we should have done.

"We were given assurances by our supplier that those trains were fully overhauled and they weren’t in respect to the doors and this has been the central reason why the service has been poor.

"The specific reasons is the doors on the units have been of poor quality in their operation.

"We would not expect and do not intend at all to take over services until we are absolutely sure that the rolling stock is in a fit state, so that is an obvious lesson learned and will make sure that that happens next time."

Over the next five weeks, all of the faulty doors on the trains will be fixed.

He said TfL's focus is to get the service up to what it was before London Overground took over, and reassured passengers that there are no plans to take away point-to-point rail fares.

In response to Mayor Boris Johnson's comment on it taking two years before commuters see the same level of service as other London Overground and TfL rail lines, Mr Fox agreed, but said it will be a "higher level of service never experienced on West Anglia routes" - with 96 per cent punctuality.

Mr Duncan Smith, said: "Improvements are being made but it is crucial that Transport for London stick to their targets of no more shortfall trains and a reliability rate of 94% as seen before the takeover, by the autumn.

“I shall closely monitor the progress over the coming months.”