Nick, you're supposed to be an expert in sandwiches, you live in London after all...
From all the British style sandwiches I've tried, I've been impressed by THE SMOKED SALMON SANDWICH:
http://www.gourmet-food-revolution.com/salmon-sandwich-recipe.html
From all the British style sandwiches I've tried, I've been impressed by THE SMOKED SALMON SANDWICH:
http://www.gourmet-food-revolution.com/salmon-sandwich-recipe.html