My aunt and uncle forage sloes every year from the lanes and hedgerows near their home in Cambridgeshire, but if you don't have access to the homemade variety, a number of commercial products (such as Hayman's, Sacred or Gentleman Badger's) are readily available.
The classic Christmas sloe gin drink is either neat over ice, or in a glass of fizz, but it is also an excellent addition to a warm drink like our Quick-Sloe Toddy.
Combine all ingredients in a mug or heatproof glass and stir until the honey is dissolved.