See the link here.
we arrived a little late, so didn't see them all, and Ella and her friend Holly both got a bit bored after an hour or so, so we didn't stay to see the last of them... I heard it takes over 2 hours for the full 1500 or so cars to circulate past.
anyway Ella was pretty excited about the whole thing, esp when she discovered if she jumped up and down and yelled at the top of her voice to 'beep your horn!' that 9 out of 10 would respond!!!
obviously not often that Ella and Holly get encouraged to yell at the top of their voices, and get such an excited response when they do...