Just a quick update, as I know how frustrating it can be to come across a problem similar to your own, but not to see a solution.
After removing the dash lcd panel, and stipping out the circuit board, and finding nothing evident to pinpoint the cause of the problem, but satisfied that the problem was in the lcd panel somewhere, I contacted a company by the name of ECUTesting, located here http://www.carclinicmagazine.com/ren..._instrume.html
The panel was boxed up for shipment and the company contacted on Monday, they organised pick up of the item, which was late Monday afternoon. And today (Wednesday) it was delivered back to me. 5 minutes later it was back in the car, all working again. Total cost including the shipping was £239.
Hope this may help some others with the same problem.