congrats on getting both, that's awesome! i'm sure both are great choices, i'm just curious, which one do you want to do? (i don't know much about nuffield, do you know what it's like?)
i'm also really looking forward to it, but i am a little worried that everyone is going to be really smart... and thanks for the link, i read the post and it sounds like a lot of fun! i'm glad they have lots of other activities to take a break from maths sometimes - last summer i was invited to a different maths camp and it was great fun but it was quite competitive and we did a LOT of maths in a very short space of time, i hope promys is a bit less intense