Well after the recent trip back from wales on a recovery truck I decided to change a few things here and there and hope that I fix the problem.
seeing as we are not entirely sure what is causing the problem and seems to only come when the engine has been cruising I decided to change the ignition coil and the crank position sensor. These cost pennies and were an easy job

I have confirmed the fuel pump and fuel filter are all good so we can write them off...
The other thing that I think may be causing it is that the engine is really closed in with chequer plate and I wonder if it is getting too hot in there and maybe the fuel is boiling....
I did notice on the wales trip that the car was taking a far bit of time to cool down so I will be adding a 8 inch fan (anybody got one) to the engine bay t assist with the air removal and I will be cutting grooves into all of the panels to all the air to get out easier and hope and prey that resolves the issues

On a side not if I have fixed the problem already then the buggy is pretty much ready for stoneleigh now
If I have resolved it I will be cleaning and then maybe getting a bubble and then start building my shed so that the buggy can go on holiday there then I will have time to start looking at the MOJO