A replacement bus is operating instead of the Abbey Flyer services after a train fault this morning.
Commuters can expect to catch a coach between Watford Junction and St Albans Abbey until about 8am.
It will be operated by Lucketts of Watford.
To follow the incident on Twitter, use #StAlbansAbbey
Visit www.nationalrail.co.uk/service_disruptions/today.aspx for more information.
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