Thanks for your advise... just need to figure out where the control unit is?! Moisture is a possibility as recently has windscreen replaced but was in a hurry so they couldn't replace trim which has a few holes/bits missing. They warned me it might leak although it doesn't appear to be and we haven't had rain for a week.
Another strange thing is that it appears to only happen when the vehicle has been parked on unlevel ground, always passenger side up (i.e. up a kerb). Possible coincidence??!
I did read on one forum that someone had similar issue and found a black box (control unit??) under/around passenger side glove compartment and he pulled it towards him and wedged in a bit of card and since then it has worked.
My mate started it this morning no problem then tried a second time and nothing again. I am hoping its maybe an issue with the key or antenna, or even moisture in the control unit. I do not fancy trying to fix it with 'Joe Ninety Cardoc's method, knowing my luck i would cause an electrical fire in it!!!
Shnoodles
March 2016