You can reschedule within the available dates for that visit, or you can cancel without penalty 10 days before the last available date. If you cancel within 10 days of the last available date, it may affect your status
The impact will be greater the closer you are to the last available date. This is because cancelling can mean we're unable to fill the visit, and prevents us meeting our obligations to our clients, frequent cancellations may also result in us being unable to offer you any further visits.
As an example, if your visit has a last available date as the 28th of the month, you can cancel the visit without impact until the 18th of the month, cancellations made after the 18th of the month would impact your status.