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Hello folks, back from the garage. The car was still doing it’s flash or maybe not. The mechanic said he did not think it was the relay because as bhg said, the right indicators were fine. I left it with him and he called to say he had sorted it. I asked him what was wrong and he said difficult to tell. However, he said he had cleaned up all the bolts and checked earth connection, taken off the indicator stork and tested the switch, all ok, checked various wires and cleaned up all connections. So far, everything now working. I asked him what I owed and he said nothing. He said drive it for a week and make sure he had cleared the problem. This is a local garage I have used before so maybe he was being kind to a regular. It looks as though maybe it was just gunk somewhere causing the problem, I will be more vigilant in the future. Thank you for all your helpful suggestions everyone.