The Associated Society of Locomotive Engineers and Firemen has announced strike action on the London Underground amid a dispute over pay and pensions.

This comes after RMT announced similar action this month, seeing further disruption to the city's transportation system.

Aslef's full-time organiser on the London Underground said: "We take action only when needed. Unfortunately, the last few weeks have shown that London Underground management are determined to try to push through detrimental changes – despite trade union opposition – if they think they can get away with it.

“They have already announced that they intend to start training managers in August on a new attendance procedure, and will implement it from January, ignoring the current agreed procedure.

The Aslef organiser added that sickness over one week would be considered "long-term", allowing London Underground managers to more easily 'terminate' drivers.

He went on to say: “Their aim is an entirely flexible workforce with all existing agreements replaced – allowing them to cut hundreds more jobs and forcing those of us who remain to work harder for longer.

Announcing the strike action, he said: “To protect our pensions, working conditions, and agreements, our members are ready to act.”

When will RMT and Aslef strike on the London Underground this July?

Both unions are set to strike near the end of July with RMT announcing rolling strike dates between July 23 and July 28.

Similarly, Aslef will strike on July 26 and 28, leading to widespread disruption for passengers across the city.