A new wave of industrial action in a long-running dispute over pensions and benefits will halt vital engineering works this weekend, writes Tony Patey.
RMT said essential works on the Northern Line worth tens of millions of pounds have been cancelled and there were also safety fears as the Emergency Response Unit supports the action.
Tube Lines members have been instructed not to book on for turns of duty from 6am this morning until 5.59am on Friday, and to refuse to work any overtime from 6am tomorrow until 5.59am on Monday.
RMT said when Tube Lines was created as part of a public private partnership in 2003 it closed its section of the Transport for London Pension Fund to new employees and opened up an inferior one.
After nine years most workers are now either in the new scheme or have no pension provision.
RMT has been pressing management to reopen the original pension section throughout that time but this was refused even after recent months of talks.