Robbie Naish
I haven't heard of a holding pool for Britannia! I don't want to be rude, but are you sure you got offered a place?
Rockbound
There is already a lot of recent material about the 1st stage written. And I have found to be correct and very useful.
But if you want a big tip for the math paper... RTFA... Read The answers...
Good Luck to those all stages.
T'n'O