Right, I"ve registered for Day 1a is there anything i need to do now or is it sorted and I just show up at DTD on the Saturday for the tourney? Do I have to become a member of DTD? Will I need identification or any proof of who I am etc.?
Thanks. 
Yes, you will need to be a member of DTD, so yes, you will need photo id with you.
It"s worth pre-registering on the DTD website, as if you turn up on the day, they will only point you at a computer in reception and ask you to do it then, so you might aswell get it out of the way before you get there.