Watford rail users have been warned to expect trains disruption until the end of Monday after an engineering train derailed.

London Overground and Southern services are set to be delayed or cancelled after the incident on the line between Watford Junction and Clapham Junction.

National Rail said on its website this evening: “An engineering train has derailed on the line between Watford Junction / Willesden Junction and Clapham Junction.

"As a result, trains running between these stations are disrupted until the end of the day on Monday 22 January.”

It continues: “During planned engineering works this weekend, an engineering train derailed between Shepherds Bush and Wembley Central.

"Work is under way to re-rail the train, but additional damage to the points and the overhead electric power lines will require additional repair. Henceforth, the line is expected to be shut all day tomorrow, Monday 22 January.”

Southern services will also be affected, between Clapham Junction and Watford Junction, East Croydon and Watford Junction/ Hemel Hempstead, and Selhurst and Hemel Hempstead.

It comes amid widespread travel disruption as Storm Isha batters the region – with a Met Office yellow weather warning in place until 12pm tomorrow.

London Overground customers have been “strongly advised” to seek alternative travel, with no trains running between Shepherds Bush and Clapham Junction. A shuttle train service is operating between the stations.

Southern users have been warned services between Clapham Junction and Watford have been suspended on Monday. Tickets will be accepted on alternative transport routes.