Great shot Andy of a stunning machine and the perfect location, it summarises the age of steam and majesty of those powerful engines.
Hope you did not have to stand around too long to get the image on a cold morning.
If I may suggest I would be tempted to crop in closer to the left of the telegraph pole and lose part of the field so making the engine and viaduct larger in the frame ( you will need to crop the person framed in the arch out though), this is just something I would be tempted to do if it was my image but again this is a personal view.
Thanks for sharing and have to say I am jealous and would love to have been there to capture this.