Ok all sorted. Feeling kinda proud but in honesty is was more luck than judgement.
There are two release clamps at the top of the door and two more further down, I only needed to drop the window a mm or two and lean it towards the car. Worse thing was getting the sticky liner off and fixing the door car on again but a length of low diameter hose over the pin made that easier.
Bit of packing on the handle end of the Bowden cable and passengers can now escape.
All washed and hovered for the Gloucester Car Show tomorrow.