Well another quick update, recently we have had a couple of little issues with Daisy the TD5 90, it all started with a bit of wet weather, when trying to drive the engine warning light came on and throttle response stopped.
After using diagnostics the fault showed up in the computer as Driver Demand, after a bit of looking we thought it was the EGR valve, a bit of inspection showed that it was a bit clogged so we fitted an egr blanking kit. that seemed to do the trick for a little while.
Then a couple of weeks later the same issue happend again! unimpressed we decided to go to the next possible cause the accelerator pedal, we had purchased one off ebay at the same time as the EGR valve so put it back in and the fault remained the same.
We noticed that the fault was caused when pressing the clutch, so replacement of the switch on the clutch pedal with MSK100050 [MSK500010] seems to have sorted the issues for now.