Only travel if your journey is truly necessary on Monday and Tuesday (July 18 and 19).
Former Bedford police officer jailed for online child sexual offences
Three men in drugs arrest in Bedford's Queen's Park following tip-off
National Rail strike: Only travel if your journey is essential, Bedford commuters told
Drone footage shows huge fire caused by lightning strike in Bedford's outskirts
Grass fire narrowly averted after car bursts into flames on A1 at Wyboston
This means there is a substantial risk of disruption to the train service.
Thameslink will be running a significantly reduced service across all routes with speed restrictions in place. Trains that do run will be busy and travel is expected to be disrupted with a high chance of incidents that cause cancellations.
Angie Doll, Govia Thameslink Railway chief operating officer, said: “Please think carefully about your options and travel only if absolutely necessary on Monday and Tuesday.
“With the Met Office issuing warnings for extreme heat, speed restrictions are being put in place across our network to keep trains and passengers safe.
“This means we’ll have far fewer services for people to catch and there will also be at very real risk of substantial disruption.
"Even if you are able to travel in the morning, you may need to consider alternative ways to get home as a result.”