Flying Scotsman has just passed through Doncaster, which has a special connection with the locomotive.

Designed by Sir Nigel Gresley, it was built here and emerged from Doncaster Works on 24 February 1923.

A legend was born, as they say. 

Image source, National Railway Museum

It is pictured here sheeted down at Doncaster Works on 1 March 1924 ready for transport to the Empire Exhibition at Wembley.   

Look at the scenes at Doncaster as crowds wait for Flying Scotsman to arrive.

As Flying Scotsman approaches Doncaster, the town where it was built, Michael Portillo described it as "an engineering triumph".

He praised its designer Sir Nigel Gresley for having "an eye for engineering, for design, for style and for marketing".  

Mr Portillo said he was "very excited" to be travelling on the train as part of filming for BBC documentary series Great British Railway Journeys.

"This is certainly the most famous journey and most famous locomotive in Britain," he said.

Our reporter Tom Ingall has managed to wangle his way inside the cab of Flying Scotsman.

I think it's fair to say he's currently like a child in a sweetshop.

The service is currently approaching Doncaster, so it's about 20 minutes behind schedule. 

Thanks for getting in touch with us about Flying Scotsman's inaugural journey up the East Coast Main Line today.

Chris Mott, emailing from Baku in Azerbaijan, said: "A shame that the scheduled Flying Scotsman was able to overtake the historic one, however it demonstrates the superiority of current technology.

"I remember burning my finger on the nameplate of the engine as it stood on the main northbound platform at York during its service days."

Paul said: "Flying Scotsman on show today, Aston Martin on show yesterday - so very proud of British engineering".  

You can contact us with your photos and stories here. 

Tom Airey
Reporter, BBC News Online

At the risk of sounding like the BBC’s Sportsday Live, Flying Scotsman required a late fitness test before its return to centre stage today after a recent spring failure.

Like a rapid winger pulling up on the football pitch holding their hamstring, the news caused some gasps from the touchline (or the platform’s do-not-cross line anyway).

Image source, Getty Images/AFP

Thankfully, the engineers did a top job and the star player was deemed ready for today's comeback.  

If you were one of the people standing on the platform at Newark, I think it's safe to say you may struggle to spot yourself on Tom Ingall's video below.

Flying Scotsman has now reached Retford, where it's stopping for water before it leaves Nottinghamshire and enters South Yorkshire.

Flying Scotsman has slowed to allow a train to overtake on the approach to Newark.

The BBC has a couple of TV correspondents fortunate enough to be on board the train today, you can follow Tom Ingall, external and Richard Westcott, external on Twitter.

Pictured below is Jean Bacon of the BBC French Service interviewing Mr Howard, the engine-driver, back in 1954.

Judging by Mr Bacon's pristine trousers, he was yet to volunteer to help shovel coal in the engine's cab.

Had to bring you this picture from a little earlier in the journey, as the locomotive entered a tunnel near Hatfield, leaving a trail of steam in its wake.

Image source, PA

This must have given those in the cab of this Virgin Trains service goosebumps.

It isn't every day you pass the Flying Scotsman.

Flying Scotsman has passed the stretch at Stoke Bank, near Grantham, where it became the first steam locomotive to achieve an authenticated 100mph run back in 1934. 

However, some claim City of Truro was the first steam engine to break the 100mph record in 1904 when it apparently reached a speed of 102mph running down a slope near Somerset.

It's the same location as Mallard achieved its 126mph record breaking run in 1938.

We've had a statement from Network Rail on the incident which earlier stopped the service for about 15 minutes. 

A spokesman said: "Reports of people trespassing on the lineside meant that services near St Neots were slowed down between 9:00-9:15. 

"The Flying Scotsman was brought to a stop at this time while British Transport Police made sure that everyone was safe. 

 "We are all excited to see The Flying Scotsman return to our rails and we know that many people have waited years for this. Please stay safe and keep away from the trackside."

Tom Airey
Reporter, BBC News Online

Apologies for the delay in posts over the last 30 minutes, it wasn’t trespassers who brought our service to a halt but technical gremlins.

We seem to be back up and running now and will hope to make up the delay by breaking our update speed record over the next stretch.

Despite giving it a huge head start, the electric Flying Scotsman has overtaken it's historic steam-powered namesake.

You can spot a couple of news helicopters hovering above too. 

Thanks to Richard Salkeld for the footage. 

Zak Parlby, 14, is on board the Flying Scotsman service with his grandfather John Parlby.

His love of the locomotive was passed down to him by his granddad, with his passion leading him to take on a sponsored swim in 2009 to help with the restoration costs.

He wanted to raise £10, but ended up getting £600. Top work Zak!

The Flying Scotsman service has just pulled up in Peterborough, where it's scheduled to stop for about two minutes.

The crowds on the platform here are all after a photo!

The crowds are out in numbers to see Flying Scotsman pass.

The sunny, clear weather is also providing perfect conditions for a decent photo.

Again, if you're hoping to spot it pass, make sure you keep away at a safe distance. 

Ron Kennedy, 83, is one of the passengers on board today.

Mr Kennedy, from Leigh-on-Sea in Essex, started off as a cleaner at King's Cross' 'Top Shed' and eventually became Flying Scotsman's driver from 1956 to 1963.

"It's unbelievable. I never dreamt about being on it again. To be out with it is just fantastic," he said. "It was a good engine." 

His grandfather'also worked at King's Cross and his dad was a shunter in the goods yard.

Competing for attention in the morning sun, Arsenal's Emirates Stadium creates an eye-catching backdrop to the Flying Scotsman in full steam.

Image source, Getty Images

And here's a view of it going over the Digswell Viaduct near Welwyn Garden City a little later.

Image source, PA