Bloody Mary (serves 6-8)

1/2 75cl bottle vodka
2 tbsp tomato ketchup
1 tbsp Worcestershire sauce
1tsp celery salt
1,2 lt tomato juice
4 tbsp lemon juice, strained
4 tbsp orange juice, strained
ice cubes

Whisk the vodka, ketchup, Worcestershire sauce and celery salt until well mixed.  Put the tomato juice and fruit juices in a large jug and stir in the vodka mixture.  Serve over ice.