Is it permitted to turn left from the occupied lane or make a U-turn at this intersection?

The P-8b directional arrow visible on the carriageway indicates that from the occupied lane, it is permitted to proceed straight ahead or turn left. In accordance with the regulations, it is also permissible to make a U-turn from a lane designated for a left turn, provided this is not prohibited by the B-23 'no U-turn' upright sign, which is not visible in the situation shown.