but it's working for now
The throttle body heater leak was getting ridiculous so I cut the hoses and managed to gently massage* the pipe from the head over to the other side and hook it up to the plastic pipe which promptly snapped and left me without enough slack to join the ends. So I ended up breaking some more plastic pipe off so I could use some of the other rubber pipe in a bodgtastic fashion to make the fine engineering solution below. It isn't leaking now, but the rubber hoses are joined over bits of very brittle plastic pipe so I don't have great hopes for longevity.
So, seeing as the pipes I have don't appear to be very original or even their own shape... should this be a 6mm ID pipe all the way through? We're driving to France on Sunday so I'm very tempted to nip into HellFrauds and pick up some coolant pipe of the right diameter and replace this a run from the expansion tank to a single join to the hose which comes from the top of the engine. I'm not up for taking the throttle body off unless I really have to.
*Pull while swearing