Thanks for all the comments. I originally put in for my variation for a rifle to shoot deer primarily to protect my woods and orchard, so I'm by no means a trophy hunter. Having said that, if it happened to look like it might make the grade (any grade!) I'd probably get it measured.
I plan on skinning the head later in the week and boiling it. From my research it seems like colour is a small part of the scoring, but as Arron said, those few points may make the difference. I'll not cut the head just in case, so I can give it a quick weigh. To be honest, whilst the length is around 26cm and the span is 20cm, the beam doesn't look that thick, so I can't imagine it will meet the weight. But I am definately no expert!
Whatever happens I'll remember it, and be proud of my first buck.