So I took him down to Woodhill Sands - which I intend to make good use of this winter, as it's a natural sand trap, so no mud - at worst - wet sand.
I only used the 45ft line so I was pretty happy about that, and first off he wasn't happy about being tied up to the float so he couldn't graze! LOL
Then we walked to the judges box to sign in, and then we went straight into trot and canter on the end of the 45ft - he was pretty interested in checking out the place so I let him drift off the edges and sniff things as his resting spots. I tried a couple of changes of direction too.