Could I just double check something here...
"Owing to access constraints there is a limited time in which to enter the fort between 10:00 and 11:00. People arriving before 10:00 should muster in the car park to the east of the fort and visitors centre before being guided into the fort. People arriving after 11:00 should park in the car park to the east of the fort and visitors centre and make their way into the fort via the visitors centre."
Apologies if it's bleedin' obvious to others, but I'm reading the above to mean that no admittance is being allowed for forum vehicles between 10:00 and 11:00. That being the case, we'll make sure that we arrive before 10:00, as I will need to meet the first exit window at 13:30, as indicated below.
"There are a series of live firing demonstrations during the afternoon at 11:30, 13:00, 14:00 and 15:00, so we have a series of exit times that will not conflict with these. Exit times will be a 15 minute window centred around the following times 13:30, 14:30 and clear the parade ground at 15:30."