All sandwich fillings (but not together!): a slice of tongue, a slice of haslet or sandwich spread. Reckon all of those are very out of fashion.
Ohhh haslet, yes indeedy
My nan lived in Lincolnshire when I was little where it was huge. She used to get it from a butcher's van that came to the village twice a week. Incredible stuff.
Was less enamoured of sandwich spread after chucking a load up when being travel sick. Pretty much the same coming back up as going down