I was talking about this in the pub a few weeks ago to a friend; he said he used to drink it abroad, but had never seen it here for sale. Being me, I thought "How difficult could it be?"
I got myself a bottle of rum - the own brand type from a supermarket for this;poured it into a Kilner jar; added two good tablespoons of honey, gave it a good stir, closed the lid and left it for about four weeks or so, until the honey completely dissolved. We've tested it tonight, and it's very, very good; I imagine it would be lovely as a hot toddy if you had a cold - it would soon sort you out!
Will definitely be making it again soon.