If you want to start later than the time slot indicates you can, of course, but the end time will not change. So it comes off your own sailing time. You can indicate in the notes during booking that you are coming later and approximately what time you expect to be present. This is common if you book a half or full day, for example, so let our colleagues know by putting in the notes that you want to start later.
If you are much later on the day, more than half an hour than the start time, please call us.