Wow! that brings back some memories! I was a little kid then and went to that very one. It was always Twickers. I remember the food tents and those trays and sitting under the trestle table to eat it. It was like school food, stewed prunes and custard next to mash and peas. LOL This was after what seemed like hours queing.
8 day assemblies, morning, afternoon and evening sessions divided by lunch and teatime breaks. Don't know how my parents did it!! Strange thing is, it was quite a lot of fun as a kid!