It’s a bit neglected, but if you live near the village of Long Crendon in Buckinghamshire and are wanting to improve your skills then this site provides an opportunity.
Closest postcode is HP18 9AU. This will land you in Peascroft (road). If you turn right into Peascroft then follow it to the end you’ll be faced with a lot of fields and the track is visible off to your left.
Not a vast amount and it needs a bit of TLC but the pump track (designed and built by DT Leisure) and mini skate park provide an opportunity to hone your skills if you live in the local area.