Warning to stay off the tracks ahead of Flying Scotsman trips through Surrey this summer
Network Rail says it puts lives at risk and is a criminal offence
Enjoy steam engines from a distance - and stay off the railway line.
So says Network Rail, ahead of trips planned for Surrey this summer.
Journies along the network carrying passengers on the iconic Flying Scotsmen and other diesel steam engines are taking place until mid-September, travelling through Chertsey and Guildford.
The rail owner has issued a stark warning after people were seen trespassing on the tracks near Basingstoke earlier this month, as well as near Reading, to catch a better view of the iconic Flying Scotsman as it passed through.
Network Rail is reminding the public that such behaviour could put lives in danger, and that it is also criminal offence.
It says trespassing causes significant disruption across the network resulting in delays for thousands of passengers and can result in catastrophic injury.
It says the latest figures show that over the past two months, there have been 179 incidents causing trains to be delayed by almost 97 hours.
Mark Killick, Network Rail Wessex route director, said: "It's great that so many people have an interest in the railway and that they want to see historic trains such as the Flying Scotsman, but it's vital for them to stay safe.
"Those acting irresponsibly not only put their own lives in jeopardy, but the safety of trains, their drivers and passengers too.
"The railway is extremely dangerous if people misuse it. It's full of both obvious and hidden dangers, which carry risks of catastrophic injuries or even death.
"It is never acceptable to go onto the track for any reason. Come and enjoy the spectacle of these iconic trains, but please do so from a safe place."
Inspector Andy Jackson, embedded British Transport Police officer said: "Seeing the Flying Scotsman and other steam trains can be an exciting event for many people and we want everyone to be able to have a great day out.
"Our priority is the safety of everyone viewing and travelling on the train, and our officers will be along the route and at stations to ensure everyone can enjoy the event without putting themselves or others in danger.
"Please remember to use safe vantage points to view and take pictures of the train, stay clear of the line, and do not risk serious injury or death by trespassing on the tracks.
"It is important to remember that the railway is an extremely hazardous environment and those caught trespassing or obstructing trains can expect to be prosecuted."
Trespass on the railway is a criminal offence with up to a ÂŁ1000 fine.
Train obstruction is punishable by up to two years in prison.