There are multiple planned engineering works taking place over the Easter weekend on multiple rail lines.
The services affected include the following rail companies;
c2c
Caledonian Sleeper
Gatwick Express
London North-western Railway
London Overground
ScotRail
South Western Railway
Southern
Trans Pennine Express
Virgin Trains
The main routes affected include;
NO TRAINS TO OR FROM LONDON EUSTON from Friday 19 April to Monday 22 April
No trains to or from London Fenchurch Street from Friday 19 April to Monday 22 April
Amended service between Preston and Glasgow and through Motherwell from Friday 19 April to Monday 22 April
Amended South Western Railway services from Friday 19 to Monday 22 April
Reduced service to / from London Victoria on Friday 19 and Saturday 20 April
The links below contain more information relating to these works, it is advisable to check prior to traveling.
http://www.nationalrail.co.uk/service_disruptions/219009.aspx
www.nationalrail.co.uk/service_disruptions/currentAndFuture.aspx?TravelDate=19%2F04%2F2019&TOC=