The winter months are prime for building. The brambles and bushes are at their least dense, ridings at a bit of a lull etc., but if you do swing a leg over and get the wheels rolling there's a lot of fun to be had on the fresh built stuff right away while it's still deep loam.
Here is a short edit and a few photos from the day, few hours of digging, hour or so of shooting then a load of full runs and trains, pretty good day in my book. Enjoy!

Jimmy deep in the woods

Carving the rut

Loam train

leaning it over