The London Assembly has released a report today claiming delays on the London Underground have risen by 20% between 2009/10 and 2010/11.
The study estimates that passengers spent an extra 6.5 million hours in the Tube in 2010/11 due to the increased delays.
The report claims the main reason for delays was equipment failure on the four worst-performing lines (Jubilee, Victoria, District and Metropolitan).
The report also found that since the upgrade programme began in 2003/04 network delays per year have reduced by 27%.
August 2010 to January 2011 saw the longest sustained period of poor performance on the Tube since upgrade work began.
Industrial action accounted for around half of the increase in lost passenger hours between 2009/10 and 2010/11.
In the last eight years passenger journeys increased by 17% whilst service levels rose by just 2%.
The report also warns that Tube passengers should ‘not expect to see major improvements in capacity and total journey times across the majority of the Tube network for at least another five years’.
The report calls on the Mayor and Transport for London (TfL) to set out how they will address this recent unacceptable level of performance. It also recommends a review of industrial relations following a series of disruptive strikes over the last year.
It sets out the Transport Committee’s target that for 2011/12 every London Underground line should at least match its best performance from the last eight years.