Emergency services dealing with incident at Hemel Hempstead train station
People are being asked to "avoid the area if possible"
Emergency services are dealing with an incident at Hemel Hempstead train station this evening (18 May).
There are delays of up to an hour and some cancellations on London Northwestern and Avanti West Coast between Milton Keynes Central and London Euston, and Southern between Milton Keynes Central and Watford Junction.
Dacorum Police have said they are "currently assisting British Transport Police with an incident", and are asking people to "avoid the area if possible".
London Northwestern have confirmed some trains are now starting to move through the affected area.