Heat the oven 200C / Gas mark 6
Butter 10 holes in a muffin tin or 4 holes and a 1lb loaf tin.
Warm the beer and add the marmite, stirring until completely dissolved. leave to cool.
In a large bowl, mix together the flours, cheese, spring onions and bicarbonate of soda.
Whisk the egg into the ale mixture and pour into the middle of the dry ingredients.
Fold together gently, taking care not to over-mix.
Divide equally between the muffin tins, filling them 3/4 full, and the loaf tin, if using.
Sprinkle over the reserved cheese.
Bake 12-15 minutes for the muffins and 25-30 minutes for the loaf. Remove from the tin when cool.