Fast fishy pizza

Ingredients

• 225g (8oz) `ready to eat' smoked mackerel fillet, fresh or defrosted, skinned and roughly flaked
• 4 x 15ml spoon (4 tablespoons) tomato or burger relish
• 1 x 15cm (6") ready made pizza base
• 1 x 15ml spoon (1 tablespoon) fresh chopped basil
• 4-5 black olives, stoned and halved
• 4 x 15ml spoon (4 tablespoons) buffalo milk Mozzarella cheese, grated