Commuters faced the prospect of being held up after a broken rail in the Wolverhampton area blocked the line towards Birmingham New Street.
Train operators, including West Midlands Railway and London Northwestern Railway, warned that trains running between the two cities may be cancelled or diverted via Bescot Stadium.
Passengers were warned that disruption was set to continue until 6pm, with trains delayed by up to 15 minutes or cancelled altogether.
Services affected include:
Avanti West Coast between Edinburgh / Blackpool North / and Birmingham New Street, and between Edinburgh / Lancaster / Blackpool North / Manchester Piccadilly / Shrewsbury / Wolverhampton and London Euston
CrossCountry between Manchester Piccadilly and Birmingham New Street / Reading / Southampton Central / Bournemouth
London Northwestern Railway between Liverpool Lime Street / Crewe and Birmingham New Street, and between Crewe and Walsall, and between Wolverhampton and London Euston
Transport for Wales between Aberystwyth / Chester and Birmingham New Street, and between Holyhead / Aberystwyth / Chester / Crewe and Birmingham International
West Midlands Railway between Walsall and Wolverhampton, and between Shrewsbury / Wolverhampton and Birmingham New Street
Passengers were also being advised to check before travelling, and to keep their tickets for any compensation claims.