Some train services across London will be disrupted today as strike action looms.

ASLEF union has announced that there will be an overtime ban for train drivers today (September 29) ahead of full strike action tomorrow (September 30).

This disruption could impact mainline train services across the capital, with some rail operators already implementing a reduced timetable.

These include c2c, Chiltern Railways, Gatwick Express, Great Northern, Southern and Thameslink services.

Operator c2c, which runs some main line trains in Essex and east London, has announced a reduced peak time service, with two trains per hour off peak on all routes.

It comes after its lines were blocked yesterday (September 28) due to a fatality on the track.

Chiltern Railways, which operates trains from Marylebone, said that it would run a “slightly reduced service”, and that late night services will be earlier than usual.

Govia Thameslink railway – which runs Gatwick Express, Great Northern, Southern and Thameslink services – has said that an amended timetable with fewer services will be in operation.

It warned that services will be busier than usual, especially in peak hours and that passengers should allow extra time for your journey.

Other rail operators have said that the overtime ban makes it likely that some short-notice alterations or cancellations to services will take place.