Barbecue cooking apparatus; Cooking grills; Cooking stoves; Cookers incorporating grills; Stoves (cooking apparatus); Stoves (heating apparatus); Smoke baking units; Smoke cooking units; Griddles (cooking appliances); Grilling (cooking) apparatus; Grills (cooking appliances); Grills for barbecuing; Gas ovens; Gas stoves; Gas cookers; Gas cooking apparatus incorporating cooking grills; Gas cooking appliances