A London Underground train arriving at Angel station, as Tube maintenance workers start a 72-hour strike later in a row over pensions and benefits

If you’re travelling by Tube this morning your journey shouldn’t be affected by the London Underground maintenance workers’ strike.

So far it appears the 72-hour walkout by RMT union members of Tube Lines is having no impact on services.

Workers who maintain and upgrade the Northern, Jubilee and Piccadilly lines and do emergency work across the network walked out at 4pm on Tuesday and will not return to work until the same time on Friday.

The dispute is about pensions and staff benefits.

RMT leader Bob Crow said last night: “Strike action is rock solid tonight with pickets out at all key locations and we can expect the impact to escalate as the action rolls on over the next four days.

“We have tonight raised serious concerns that ad-hoc emergency safety teams are operating ill-equipped and inadequately trained and from unlicensed premises.”

London Underground strongly denied the union claims and said it would never do anything to compromise safety.