[Peter Hoskin]

Thanks David for your two responses.
Current situation
Following failure of passenger window to raise or lower from either of the two switches and no problems on Drivers window I changed over the two switches on Drivers side and Drivers window continued to operate correctly so I assume both switches are working correctly.
I fitted a new switch to the passenger side. It failed to work but the Drivers switch now does.
This suggests a failure in the wiring unique to the passenger switch.
At present the car is with my chum investigating the front end replacing bushes etc. At 84 I am finding in increasingly difficult to get under the car and operate heavy tools, or more exactly getting up again so I do the shouting while he does the heavy lifting. It may be a day or so before I am able to continue with this puzzle but I will prepare a test lamp in readyness, currently using a voltmeter and a 2volt test lamp.