Re: EZ Loader trailer brake pipes
I suspect that if you do not double flare or inverted flare the brake pipes that you will have a leak. The size you probably have is 3/16" or possibly (I doubt it) 1/4" lines. As for flaring the pipe yourself, it does take some practice or you can crack the pipe at the flare. Check eBay, a local parts store or a full-line professional tool source, do you have Snap-On Tools in the United Kingdom?
As for using pre-made sticks of braek pipe, I discourage it. Yes it is easier, but you have to "stretch" the pipe to fit by not bending or over bending and that just makes for a sloppy and potentially dangerous installation.
If you can get a set of replacement factory-bent pipes I would go that way instead of making your own. Also replace all pipes, not just the one failed right now, the rest will give you headaches in the near future.
When it comes to bleeding the system, MityVac makes a nice vacuum pump that makes the job easy. Just remove the bleeder screws, apply anti-seize and reinstall. The anti-seize acts as a seal around the threads when you apply vacuum to bleed the fluid.
Good luck.