Well according to the many recipes, all of which were similar, take 1lb sloes, 1litre gin, 1 wineglass of sugar.
Prick the skins of the sloes and drop them in the gin (obviously you have to remove some gin first or they won't fit.
I went for putting half in an old vodka bottle).
Add the sugar and shake.
Shake daily for a week then weekly for two months.
In my wisdom I decided to make this sat in the front room watching telly. This was due to the number of berries I would have to prick. It seemed daunting without other entertainment, but I can't remember what was on the box so it must have entertained me more than I expected.
This is the colour it is at the moment.