Cancellation: Contact the event organiser for cancellations or any changes to your registration. Once you have registered for an event you've committed to going and the deposit (or full payment) is due immediately. If you cancel before the date the final payment is due you still owe the deposit, and if you cancel after this date (or simply don't show up) you will lose the full amount. We need to do this unfortunately because a number of people register for events to reserve a place for themselves and then decide later if they really want to go, expecting that they can just cancel - apart from being unfair to other members, this causes a lot of work for the volunteers organising the events and reducing this workload means that people are happier to run events and that there will continue to be someone to run events in the future.