Details of Flying Scotsman's journeys on the national railway network are being kept secret for safety reasons.

Neither the National Railway Museum, which owns the iconic locomotive on behalf of the nation, and Network Rail, responsible for the railway infrastructure, will say where and when she will be.

British Transport Police have warned they are prepared to prosecute anyone who goes on the railway tracks to get a better view of her.

The decision to withhold her timetable from the public follows scenes on her return to the main line in February after a ten-year refit when people including young children risked their lives by standing on the railway line to get a better view.

Every train on the East Coast Main Line, including Flying Scotsman's, had to be stopped while the tracks were cleared, leading to 59 trains suffering more than eight hours of delays and passengers receiving nearly £60,000 in compensation from the taxpayer.

Flying Scotsman has a busy schedule of visits to different steam railways across the country and will need to use the national network to reach them as well as pulling her own services.

Jim Lowe, head of operations at the National Railway Museum, said: "It is vital that spectators do not venture onto the railway, particularly when it is on the mainline as a full timetable of regular services will be running. In order to avoid overcrowding and incidents of trespass neither ourselves nor our partners will be publishing recommended viewing points or the timetable of when the train will be passing through specific locations – this includes positioning moves.

“We wish those who are taking journeys on trains hauled by the steam icon or going to see it at an event over the coming months an enjoyable experience.”

Phil Hufton, Network Rail managing director England and Wales, said: “I cannot stress enough how dangerous it is to go onto the railway without any formal training and without permission, as well as being illegal.

"I am urging those who plan to enjoy seeing Flying Scotsman in the coming days to do so from a safe position and do not go onto the railway under any circumstances. I’d like to thank those who have observed safe practices during the Scotsman’s runs so far and ask others to follow that example.”

The only details released about Flying Scotsman's next journeys are that she will travel from York and Newcastle and back sometime on Tuesday and from York to Edinburgh sometime on Saturday.