With just three more days until the MOT expires, the hyperflashing issue had to be resolved today. Que the cavalry in the form of Colin, the auto electrician used by SP Automotive to wire up my new rear light pods when the car was being resprayed. What a fantastic chap! Came to my home first thing Saturday & didn’t take long to confirm that the Pin Out on the Ford Indicator relay is not industry standard, which explains why none of the five (!) LED relays bought from various sources ever worked. Curse you, Ford! Colin cannabilised one of the relays & rewired the three connections to the correct pins on a second LED indicator  relay which was then located 10cm away under the steering column cowel. This fixed the hyperflashing! Phew!!! Nice to meet someone who really knows their stuff… Thank you Colin!