DH makes one - he is mad keen for dianne sauce A(I'm not much of a fan myself) and this is his tried and true recipe and he'd probably have kittens if he knew I was giving it out on the www ROFL, but anyway, here it is;

1tsbp 'woostershire' sauce (<- his spelling LOL)
2 tsp sweet sherry
1tsb white vinegar
1/2 tsp minced garlic
salt and pepper to taste
sprig parsley finely chopped
1/2 tsp powdered beef stock
1/4 cup water
1/4 cup thickened cream (dollop cream is the best for this but any will do)
dash tomato sauce
dash bbq sauce
1 tsp butter

Mix wooster sauce, S&P, sherry, water, vinegar, stock, parsley and garlic

Grease skillet with the butter on medium heat, add liquid to skillet and simmer while stirring for 2-3 minutes

Add cream while stirring and once cream is mixed add tomato and bbq sauces.

Reduce sauce at a quick simmer to desired thickness.