The tube that feeds cleaning liquid to from the resevoir to the vacuum head is perished. It is split part way with a piece of red rubber, where it is nipped by the trigger in the clip on handle.
Any idea where I can buy one as it seems to be obsolete on partsmaster and Vax themselves
Model and hobby shops often have tube of this sort - also good hardware shops - much cheaper to buy from them too. Take a piece with you for a size match.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix vacuum cleaners.