Members of the Rail, Maritime and Transport union (RMT) will walk out as the dispute over jobs and pensions rumbles on.
The RMT is also striking on Network Rail and 14 train operators on August 18 and 20, alongside members of the Transport Salaried Staffs Association on the same days at a number of rail companies.
The RMT said the new Tube strike has been prompted by Transport for London’s “refusal“ to share details of a draft Government proposal they received.
This is said to have regarded the funding of the transport system in the capital.
The London Underground is to be hit by a fresh strikeIan West
RMT general secretary, Mick LynchStefan Rousseau
The union said it is giving TfL until August 2 to give assurances on jobs, pensions and working conditions.
RMT general secretary Mick Lynch said: “Our members will once again take to picket lines in this important dispute over pensions, jobs and conditions.
“They have been messed around by TfL and Mayor Sadiq Khan. And to add insult to injury, they have not seen the detail of this funding letter from Government.
“Unless there can be assurances made about jobs, pensions and detrimental changes to working conditions, then our strike on August 19 will go ahead.”
It comes after a wave of industrial action this year, causing travel misery for Brits around the country.