Jubilee Line

MQT on 2013-05-22
Session date: 
May 22, 2013
Question By: 
Navin Shah
Labour Group
Asked Of: 
The Mayor


Why will it take 30 days to repair the Jubilee Line while work is carried out to fix the acidic water damage to tunnels?


Answer for Jubilee Line

Answer for Jubilee Line

Answered By: 
The Mayor

The programme to which you refer is a comprehensive tunnel relining project in the Jubilee line tunnel north of Bond Street, to ensure the safe and reliable running of the Jubilee line for years to come. Due to the nature and complexity of the works, they cannot be carried out during operating hours when trains are running.

Most of the work will be conducted when the line is closed overnight, so that passengers are not affected by it. However, there are some parts of the work programme that take longer than the 3.5 hours available overnight. For this reason TfL also needs to do some of the work during one day or full weekend closures - these will be relatively infrequent and spread out to minimise disruption. On some other occasions when only a few extra hours are needed on top of the overnight period, TfL will extend engineering hours with a late start up to services.

It is the case therefore that the programme of works is much longer than 30 days - done all in one go, relining this section of the tunnel would need a closure lasting 4.5 months. The approach taken by TfL with intensive use of overnight engineering hours has kept disruption to passengers to the absolute minimum.