I really like the first one Keith,the background is unusual but highlights the exhaust heat really nicely. The second one is let down by the unfortunate tree in the background which distracts the eye from the main subject. And number 3 doesn't really do it for me I'm afraid. Nice and sharp but too much "dirty side" on show for my liking.
Would love to go to the "loop" one day. Fair trek from Lincolnshire though. What lens was it Keith?