After more than a decade away from the mainline, the world-famous Flying Scotsman is back in service following a £4.2 million overhaul.
Thousands of fans have made their ways to rail hotspots to catch the train, which has been running between Edinburgh and London since 1862, and is now touring the UK this year.
But where can London train enthusiasts spot the Flying Scotsman?
The locomotive will be travelling from Paddington Station to Salisbury on Saturday (May 21).
Following this chance to see the steam train that, two Surrey Hill's tours depart from London Victoria on Wednesday (May 25). After touring Surrey, the train will return to London in the night.
The Flying Scotsman will also be hauling from Crewe to Paddington on June 5-8.
A Network Rail spokesperson told getwestlondon that as part of new policy, they are no longer releasing times of when the vehicle departs to avoid trespassing incidents - only those who are travelling on the locomotive will be given details of time.
Although tickets are sold out for many of the journeys, some can still be found on the train's website .