Thank you Richard for your help.
Got the pipe and clip from Citroen
fitted pipe but couldn't get the clip on properly so refitted old clip which I also couldn't tighten up, I then got a suitably large jubilee clip and put it round the original clip and tightened it. Is there a special method to tighten this clip.
Is there any reason why this should not be OK?
A Garage looked at it and said they'd do the same. What I'll do is clean the area with gunk, top up the reservoir and see that everythings ok.