The session scheduled for this date has been cancelled due to the recent wet weather and what is likely to happen weatherwise up to the 8th. Next scheduled session is on the 15th.
For dates etc see: Info on NP Mountain Bikers site
More details on Andy's website at the link below:
MTB Skills Sessions
They have a reduced price for NP Mountain Bikers members but all are welcome!
If you are interested, you can contact them directly to let them know you want to come along: here