I'm in Essex for 10 days now, but I'll try to get some pictures up tomorrow if I have time - also I might try using the t clamp as suggested, to see if that works, as I'm pretty sure that the vacuum leak is caused by using a jubilee clip (it creates a bulge in a certain area of the pipe if you try compressing it more than 2mm) and by having the current coupler slightly too short.
Cheers, Mo