The Central Line had severe delays on Friday as emergency services responded to a casualty on the track.
The line reopened after an earlier suspension but is now running with delays while Bethnal Green Tube station is now back open.
Tickets are being accepted on London Buses, Elizabeth Line and London Overground.
RMT action could also see Oxford Circus close at short notice between 10pm on Friday and 6am on Sunday.
A good service was being reported on the rest of TfL network apart from the Northern line where there are minor delays due to a shortage of trains.
