So I bought a new plastic flange and hose for the rear of the head.
After parting with the cash at the stealers and removed flange and hose i inspected the flange
but found no crack in it, but the O ring was shaged and it must have been failing.
Feeding the new hose though the rubber boot is a real *****,, but did it after a few goes.
A bit of lube would have helped!!!
After connecting it all back up,,, no leaks at all so thats good.
I you buy a flange it comes with the O ring already fitted, this is fitted on the back of the head,
you still need an O ring for the metal pipe that fits on the right side of the flange.
(the 2 bolts on the metal pipe are quite short and you expect them to be longer so dont get carried away undoing them or you will drop one)
Its a fidily job and helps if you have small hands like me,,but still got so cuts and scuffs.