Trains are running normally following the communication alarm being activated on a train at London Waterloo East.
Disruption caused by a problem with the station lighting at Mill Hill Broadway has now ended.
Trains are now running normally following a points failure between Newcastle and Hartlepool.
Delays caused by an earlier trespass incident between Mill Hill Broadway and Hendon have ended.
Trains are now running as normal following a problem with platform equipment at Highbury & Islington.
Trains are now running as normal following a problem with station lighting at Mitcham Junction.
Disruption caused by a problem with the station lighting at Haydons Road has now ended
Following a fault with the signalling system between Eastbourne and Hastings trains are able to run as scheduled.
Trains are now running normally following an operational incident at Gatwick Airport.
Trains are no longer affected by an earlier failure of the electricity supply between London St Pancras International and St Albans.