Another problem.
S1 has been becoming difficult to start and within 2 days almost impossible without priming.
"Air Leak!", I hear you all shout simultaneously.
WRONG!
I've carefully investigated this and where the primer bulb is, there are two pipes that rise up from the bulkhead. One is clipped to the turbo pipe with a 19 clip as attached photo and the other goes into the back of the primer bulb.
The service citroen piccy is wrong so I have edited it and attached below.
It notes the part as
FUEL FEED PIPE
DIAM 7X17-7X19
Does this mean 7mm. int diameter and 17mm. ext diamter?
Edited Image: Arrow shows position of no. 19 on turbo pipe AND leak

Where the pipe from the diesel pump return drops down and clips into the no. 19 clip, there is a split. Wondered why I was only getting 35 mog instead of 45mpg and now it's clear.
Has anyone any experience of repairing this pipe? Just wondering what internal diameter the hose is as I am thinking of inserting brake pipe and using fuel clips.
When it is unclipped and the primer pumped it really squirts out the diesel so I am hoping this will last until Saturday given the other issue with the S2.
If anyone has done this, do they have any tips because it looks nice and easy to get to.... NOT!