Rhubarb Crumble

• 14 rhubarb
• 2 eggs
• 1 orange
• 270 gr butter
• 150 gr self raising flour
• 95 gr caster sugar
• 70 gr pale muscovado sugar
• 60 gr flour a bowl (into)
• 24 gr hazelnut kernels (chopped)
• 1 gr cinnamon (ground)