I remember learning of this unusually-named culinary classic while in school and although there are many wonderful canned convenience products on our modern store shelves, this ain't one of them. And it's a terrible insult to the original recipe.
Mrs. Heinz? Stick to making catsup, ok?
And anyone caught microwaving Spotted Dick should have their hand cut off and shoved up the ol' root canal. Microwaves are for reheating coffee and popping popcorn. Dammit, don't even get me started about the awful microwave.