I don't have a copy of PANS-OPS to hand, but in the US the procedure is specified in the AIM (ref 5-4-20e);
"A visual approach is not an Instrument Approach Procedure and therefore has no missed approach segment. If a go around is necessary for any reason, aircraft operating at controlled airports will be issued an appropriate advisory/clearance/instruction by the tower. At uncontrolled airports, aircraft are expected to remain clear of clouds and complete a landing as soon as possible."
Airclues