Indonesian Cocunut Curry opposite BBC Introducing was the best thing again this year.
Special mention to the brownies place at William's Green doing a brownie and a milkshake deal for £6 - I had a smaller, worse brownie from a place between Other/Silver Hayes for £6.95 and I had a smaller, worse milkshake near Left Field for £6.
Dosa was interesting, I've never thought to have a spicy mashed potato toastie before. £1.50 for a bhaji the size of my head was great though.
I didn't have anything bad so the worst would be a place called Loaded Burger. I feel like a dick for writing that but I was walking around near the bandstand around 1am and the guy on the stand said "Excuse me, do you want a burger?" and handed it to me, so I ate it and it was thoroughly average.