Which turn indicator should be turned on when reversing at this intersection?

Erklärung

The turn-around is made by driving around the central island. The right-pointing chevrons and the blue circular sign direct traffic into and around the ring to the right, so the right-hand indicator announces entry into that path. A left signal would suggest movement toward the island against the mandatory direction, while giving no signal would leave the entry into circulating traffic unannounced.