A broken down train at St Albans is causing rail delays for commuters this morning.

Thameslink said there will be delays of up to 20 minutes between Luton and London St Pancras International until at least 11am.

10:00 SERVICE UPDATE: There are delays following an earlier train fault. Please check http://t.co/G7zq8OeBqe for individual journeys.— Thameslink (@TLRailUK) April 27, 2015