The leaders of the RMT and ASLEF have sent a joint letter to the Mayor of London asking for the Elizabeth Line and London Overground into public ownership.
As with other train operators throughout the country, West Midlands Railway (WMR) train services will be disrupted by industrial action until 6 February.
Chiltern Railways services will return to normal on 6 November after ASLEF suspended its planned industrial action on the London Underground.