In a large bowl, cream together the margarine, white sugar, brown sugar and peanut butter until smooth. Beat in the eggs two at a time then stir in the golden syrup and vanilla. Mix in bicarb soda and oats until well blended. Stir in the chocolate candies and chocolate chips. Roll dough into 2 inch balls, and place 3 inches apart on an ungreased baking tray. Flatten slightly with a fork.
Stir in the Smarties and chocolate chips. Roll dough into 5cm balls, and place 10cm apart on an ungreased baking tray. Flatten slightly with a fork.
Bake for 12 to 15 minutes in the preheated oven. Cool on baking trays for a few minutes before transferring to wire racks to cool completely.