Tip the oats and cereal into a large bowl and mix well, using a wooden spoon or clean hands.
Put the almonds and sunflower, sesame or pumpkin seeds in a frying pan with no oil and, over a moderate heat, stir until they are lightly toasted. Leave to cool a little then tip into the bowl and mix.
Put the sugar, syrup and lactose free butter in a small pan and heat gently, stirring with a wooden spoon until melted, then simmer for 2 minutes until slightly thicker and syrupy.
Quickly stir the syrup into the dry mix, stirring until it all starts to bind and there are no dry patches.
Quickly tip into a 20cm square tin and press down with the back of a spoon to even out the surface.
Leave to cool and set – about 2 hours. Cut the mixture into 6 one way and 3 the other to make 18 bars. Store in a tin, or wrapped tightly in foil for up to a week.