This was originally launched in 1970, Old Jamaica bars had a mix of milk and plain chocolate with rum flavoured raisins - though I don't think you could get drunk on them, although at the time I might have tried...
This Cadbury bar is no longer made for the UK market apparently, but you can still stock up on Old Jamaica if you look around on the Internet. It's a lovely big bar, very hedonistic!
Do You Remember Cadbury's Old Jamaica?
Do You Remember Cadbury's Old Jamaica?