My daughter had a grand time with the RAF in Oxfordshire yesterday - flying with 6AEF at Benson.
There was no publicity within the ATC org. for this event. How hard would it have been to have sent a poster to all the southern England ATC locations - it's in the public domain. Offer them x% discount for group tickets of 10, and hey presto, your numbers swell, and your ice cream van does a good trade.