A lack of staff is causing train disruption on the Abbey Flyer this morning (May 23).

Shuttle services between Watford Junction and St Albans Abbey, known as the Abbey Flyer, may be delayed or cancelled throughout the whole morning - until 3pm - because train crews are not available to run it.

However, a replacement bus is being organised for affected commuters and tickets will be accepted on the Arriva 321 in both directions.

For more information, click here.