Right what do i need to get?

brake pipe, what size?
flaring kit?
Whats the name of the part that splits the line into 2?

Also am i best of doing a front circuit and a back circuit or do them diagonally? Im using a rover 416 master cylinder which has 2 outlets.

I used 3/16 bought a flaring kit and fittings.
T-piece!

Definitely front & rear circuits - not diagonal

Why not diagonal? I though front/rear was phased out in favour of diagonal on production cars to make emergency braking when one system failed less likely to spin the car?

My Indy is split front/rear but I did it to make the pipework simpler

[Edited on 3/8/07 by matt_claydon]

and there was I thinking that the thing that split the line in two was called an angle grinder!