Right, job done:
Another pic of my worn hose:
I first removed the air intake manifold end of the pipe. Just release the spring clip, slide it back and then twist and pull. I then blew into it S per Cliffords advice. My non-return valve is solid
The old pipe, although dry and perished externally looked okay internally.
Still flexing, but compared to the new one very dry and 'stiff'
Finally the new one in place. I replaced the old spring clips with new jubilee type ones.
Note the cable ties on the accelerator cable to help support it. I used the old ones by slipping the old pipe out and the new in.
Foot on the pedal, again as per Cliffords post whilst starting confirmed all is well with the servo.
Another job by ticked off of the list.