Muntons Export Stout from the 1.8kg Connoisseurs range.  It makes 40 pints of a typical Irish style hoppy stout using normal brewing equipment.  
This kit  needs the addition of 1kg of sugar but to make it extra special and much like a Guiness substitute the sugar with 1kg of Extra Dark Spraymalt. This will improve the taste and body.  There is an option on the dropdown menu for this recipe.