Thanks Anwar, she is a real thoroughbred machine and it was great to have the opportunity to film her

Thanks, she is a beautiful machine. I'm still amazed at the number of people who have watched this.

I have not seen Mallard run, but I had the privilege of watching 4472 in Australia, double heading with our (enormous by comparison) 3801 Pacific into the southern outskirts of Brisbane - at 81 mph at dusk - spewing the occasional hot coal from the chimney, firebox glowing and ground shaking as they went past. Then I could understand boys around the world watching and waiting for their favourite local express engines to storm past. What an evening! I got a ticket for speeding on my way home :(

Love the look of the Mallard, my fav steam loco. To see this running at 125mph must have been amazing!

What a Gorgeous piece of engineering!! when i was kid i allllways wanted a model kit of the mallard!

Excellent job! Always been a fan of Mallard. It was good to see her in motion.

Undoubtedly the British built the world's best steam trains. Just waiting for Bachmann to release The Mallard any day now, Beautiful steam, beats diesel for me any day.

Thank you, the A4's are fine engines and look made for speed. We are indeed spoilt in the UK, a few weeks ago there were three steam specials within 100 miles of my home.

Fabulous !!!! would love to see this train in person. From the States here.

Excellent ... another iconic piece of British engineering at its best !

Absolutely awesome footage, a beautiful piece of machinery. Thanks for sharing.