Mark it may be that the concentric cam on the steering wheel shaft has slip or maybe work, alternatively the plastic on the switch that flicks the indicator stalk may have worn away in which case it would be a replacement switch. worth taking of the steering wheel and cowling over the stalks and investigating first. If your up to that.

Welcome to TM cheers


Adrian

Buggered Off, to a modern none leaky car, heart's still ticking