Mars is backing the re-introduction of its spicy lemon medicated lozenge Zinc 48 with a £1.5m outdoor advertising campaign. Timed to coincide with the main cold and flu season, two bursts in November and January will include posters and billboards at outdoor sites, on the London Underground and on the sides of buses. The lozenges contain 48 hours worth of zinc ­ helpful in maintaining the body's defences. {{P&P }}