Commuters enjoyed the best levels of performance on the underground network during the Olympics, despite carrying record passenger numbers, according to Transport for London.

Figures released by TfL show that passengers are now experiencing historically high levels of reliability on the Tube network – with delays down by over half from levels in 2004/05.

During the London 2012 Olympic and Paralympic Games customers experienced the best level of performance ever provided, at the same time as record numbers of passengers used the network.

The figures, covering periods 5 and 6 of 2012/13 (July 22 to September 15 this year), confirm that delays – as measured by the number of customer hours lost to disruption – were at a record low level during the Games. Period 5 saw delays down by 21 per cent, and period 6 saw delays down by 49 per cent, compared to the average for 2011/12, with many lines delivering the best performance ever recorded.

These results were achieved while carrying record numbers of passengers – with more than 101million journeys made on the Tube during the Games - up 28 per cent compared to normal levels. August 7 was the busiest day in the Tube’s history, with 4.57 million passengers.

The continuing trend of long-term improvement follows the creation of the London Underground Reliability Programme in 2011, which led to the introduction of a range of initiatives to predict and prevent failures and respond more quickly to problems.

This saw a range of initiatives rolled out across the network, from BTP officers driving the Tube’s emergency response unit vehicles under blue-light conditions and officers given enhanced medical training, to a targeted increase in signal repair staff at network pinch-points and other measures to prevent and predict signal, track and train failures.

London Underground is now developing plans to meet the Mayor’s commitment of reducing delays by a further 30 per cent by 2015.

Mike Brown, Managing Director of London Underground and Rail, said: “The work that our staff put in over the last couple of years helped to deliver a fantastic London 2012 Games, with record performance on the Tube network.

“However, there are many improvements yet to be delivered. We continue the vital work of transforming the network with new and upgraded trains, signalling, stations and track.”