Sticky date crumble pudding

Ingredients

• Pudding mixture
• 3/4 cup pitted dried dates, coarsely chopped
• 1/2 cup boiling water
• 1/2 teaspoon bicarbonate of soda
• 50 gram butter, softened
• 1/2 cup brown sugar
• 1/2 cup self-raising flour
• 1/4 cup plain flour
• 1 50g violet crumble bar, roughly chopped
• butterscotch sauce (see tip)
• thick cream, to serve
• Crumble
• 1 1/2 tablespoon plain flour
• 30 gram butter, chopped
• 1/2 cup rolled oats
• 1 1/2 tablespoon brown sugar