Yes i will be replacing the high pressure fuel pipes, i think they are about £16 per 2 pipe set from fords. Might aswell replace them if i am replacing the injectors.
In regards to injector number 4 (far right) is that amount ok? it looks like double the amount that 3 is but i couldn't find any info on how much they should/shouldn't leak back.
Why is it a particular socket has to be used, i know that with some injectors the feed is on the side of the injector but with these the feed is on the top so i don't see the point of the window

I will be buying them from swadlicote diesel as its about a 30 mins drive from me so would i be able to get the seals from them aswell and are there any other washers or seals that are needed.