Hi Coastcard
I did guess it was in the archives and had a quick wander through there. I have just been to the car and it started fine, but cut out when I opened the drv door. I think I remember the white connector when I was last under the dash trying to sort the indicator relay which wasn't the problem anyway. What I will do is what you suggested and as I come to each wire, disconnect/reconnect and if OK after that remove it. I think it's going to be a case of elimination at each wire/component etc.
I do remember that on one occasion when it wouldn't start, I checked the ignition. It would spark but not start leading me to think it was a fuel problem. It would catch for a second or two then quit. I disconnected the fuel inlet and petrol was coming through ok. I don't know what would stop it from starting if there is spark and fuel, unless the fuel is stopped electronically somehow after the union I disconnected to check. It's all very confusing.
I will have another go tomorrow if I get a chance.
Many thanks
Tony