Thanks for your help, but it's virtually impossible to get at the side repeater connections (or any of the indicator lamps) from the inside, hence the reason I was looking for the flasher relay.
There is no relay behind the glove compartment, I think you must mean on the other (driver's) side.
Behind the flap there is the main fuse panel with 4 relays. None of these control the flashers although the top square relay does look like a normal flasher relay. With all four relays removed the flashers continue working but you can still hear another relay ticking somewhere nearby, but there is absolutely no sign of it.
Any suggestions please?
Malcolm.