Commuters are being warned of 45-minute delays to trains serving Welwyn Garden City and Stevenage this afternoon (June 28).

A message on Great Northern’s website states: “A fire alarm sounding at Moorgate means all lines are closed. This is causing disruption to journeys to and from Moorgate.

Train services [may] be cancelled or delayed by up to 45 minutes or diverted. Disruption is expected until 17:00.”

It added the following services will be affected:

•Stevenage/Watton-At-Stone/Hertford North/Gordon Hill - Moorgate divert into King’s Cross

•Welwyn Garden City - Moorgate services terminate Finsbury Park

•Moorgate - Welwyn Garden City services start Finsbury Park

•Moorgate - Hertford North services start Finsbury Park

•Moorgate - Gordon Hill services start Finsbury Park

•Moorgate - Watton-At-Stone/Stevenage start Finsbury Park

For live updates check: https://www.greatnorthernrail.com/travel