Taken from'Fairworld' cookbook - Savoury cheese dishes were a popular Victorian tea-time dish. It has become a recent trend to re-create old classic dishes and this one can be found on the menu at St. John's restaurant in the City of London
Melt the butter in a pan over a low heat and stir in the flour and spices salt and pepper. Pour in the worcestershire sauce and guinness. Mix in the cheese and whisk until you have a stiff, smooth paste. Do not allow the mixture to boil otherwise the cheese will separate. Turn out on to a tray and allow to cool and set. This may take up to 4 hours.
When the spread is set, divide it into 6 and spread over the toast. The rarebit is ready for grilling or it can be kept in the fridge for 2-3 days. To finish off the rarebit, just place under a hot grill, spread-side up, and toast for 2-3 minutes until the cheese bubbles and browns.