Combine eggs, vanilla and raisins in a small bowl; cover and let stand for 1 hour.
Preheat oven to 180 C / Gas 4.
In a large bowl, cream the butter, dark brown soft sugar and caster sugar together. Sift together the flour, cinnamon and bicarb; stir into the creamed mixture. Then stir in the raisin mixture, oats and nuts.
Drop by teaspoonfuls onto an unprepared baking tray. Bake for 10 minutes, or until lightly browned.