Strikes by Tube drivers that were set to bring London to a standstill this week have been called off.
Militant members of the Rail, Maritime and Transport (RMT) union had planned to stage a second series of walkouts against a proposal to introduce a four-day week.
Its hard-Left boss Eddie Dempsey claimed the plan could increase fatigue and compromise safety. But Transport for London (TfL) insisted the changes are voluntary and called the walkouts 'absolutely unnecessary'.
The RMT had planned two 24-hour strikes running from 12pm tomorrow into Wednesday and again at the same times on Thursday to Friday.
The Circle line, Piccadilly line, Metropolitan line between Baker Street and Aldgate and Central line between White City and Liverpool Street were set to see no service.
The proposal to reduce the working week from 36 hours to 35 was accepted by Aslef but rejected by the RMT's leadership.
Closure signs at a London Underground station during the previous Tube strike last month
RMT Union chief Eddie Dempsey visiting Aleksey Mozgovoy, paramilitary leader in the pro-Russian militias during the war in eastern Ukraine
Mr Dempsey, the RMT's general secretary, is a union veteran who still lives in a council home despite now earning more than £100,000-a-year.
Shortly after his election last year, it emerged that he had visited the separatist Donbas region of Ukraine in 2015, not long after Vladimir Putin's first invasion of the country.
There, he posed for photographs with the pro-Putin warlord Aleksey Mozgovoy, a commander in the 'Ghost Brigade' of pro-Russian separatists branded a 'terrorist organisation' by Ukraine's Supreme Court.
During one rant in 2014, he urged hard-Left activists to back the pro-Putin 'anti-fascist resistance in Ukraine' against 'the Western governments' backing for the far-Right regime in Kyiv'.
Mr Dempsey also signed a letter from the notorious Stop the War coalition, which criticised Nato for showing 'disdain for Russian concerns' in Ukraine at the start of the war.
An RMT spokesman previously said the union 'does not support either Vladimir Putin or his actions in Ukraine' and Mr Dempsey said it 'fully agrees' with its position.
Aslef pointed out that the proposal would give drivers an extra 35 days off a year 'in return for some fairly minor changes to working conditions'.
'It will be the first strike in the history of the trade union movement designed to stop people having a shorter working week and more time off,' an Aslef spokesman told the BBC.