Thanks for the comments. The rider was lit in the first one by a flash that was held me lying down, manually activated as the rider went past. Going to have another go on a moonless night to try and get a bit more clarity in the sky. I was hoping to avoid the Reading glow by aiming north but it does tend to bleed in over 2minutes!
I would be so bold to say that last night was the fastest the trails ever can be, and probably the most grip too with no dust. You do have to watch out for deer locally though – I didn’t see the deer that run in front of my front wheel on a 25mph descent. I must have been focusing 30m or so ahead – had no idea the deer ran in front, but I was reliably informed I was a metre from hitting it! Im sure i would have enjoyed the venison after removing the gravel from my face.