SUCCESS!!!!
It was indeed a silly oversight on my part
In my defence i've had that many wires under floors, in and out of walls , did have the foresight to label them all up.........except I labelled the wrong ones!!! doh infact so confusing if you now asked which was where i really wouldnt have a clue!!
Does explain why the doorbell rang every time i pressed light .
Im totally made up, thankyou for all of your help, it really is very appreciated.
A couple of years in the making we have now masterlinked the house.
jay