ASLEF Union has announced tube driver strikes for April and May.

The one day walk outs will take place on Monday 8 April and Saturday 4 May.

Finn Brennan, ASLEF's full-time organiser on London Underground, explained: "ASLEF Tube train drivers will strike in April and May in a long-running dispute over London Underground's failure to give assurances that changes to our members' terms and conditions will not be imposed without agreement and that all existing agreements will be honoured.

"Despite a previous commitment to withdraw plans for massive changes to drivers' working conditions, London Underground management has established a full-time team of managers preparing to impose their plans."

He added: "They want drivers to work longer shifts, spending up to 25% more time in the cab, and to remove all current working agreements in the name of "flexibility and efficiency.

"Everyone knows what these management buzz words really mean.

"It's about getting people to work harder and longer for less.

"Management has also failed to deliver on commitments given to us on making drivers' cabs secure, on police numbers on Night Tube' and on training.

"Our members simply don't believe what LU management tells them anymore.

"ASLEF are, as always, ready to talk, but we want to see real action from management – not easily broken promises."