Well at long last I have managed to locate one of the Horror Bags Television adverts from the 1970's. I was almost beginning to doubt my mind that I had actually saw one when I was a child, but this here confirms that there were adverts for the Smith's snacks. I don't think this is the one I saw all those years ago, if it isn't then there are obviously more than one that were made; which I suppose is likely has Horror bags had been in production from 1974 up untill the early 1980's. This particular advert is as you can see from the screen shots one for the last of the range of horror bags 'Bats'. Frank Thornton who plays the vampire/Dracula is great fun whom has an assistant which I think is a Ygor/frankenstein monster character. Here we also see a shot of one of the actual Bat shaped corn snacks and the packet.
Untill I can work out how to put the advert here in The Cobwebbed room please enjoy these screen shots. I am hoping that some more will turn up sometime, I wonder how many more adverts of 'The snacks that go crunch in the night' there were?