No licence or HMRC approval is needed to steep botanicals in a spirit you have bought. Producing alcohol and selling it are the two things that do need permission.
Three makes worth starting in December: country wine that lands in spring, spiced rum ready inside a week, and a kintsugi repair that fills one dark evening.
Whole spices keep for a long time, so a spiced rum kit runs to 18 months from packing. Storing it between batches, and how long your bottled rum will last.
Bonfire night food should be one-handed and made in advance. Homemade jerky, a bottle of spiced rum and a timing plan that has it all ready by the fifth.
Spiced rum is rum with spices steeped in it, nothing more. What that changes, why shop bottles taste sweeter, and how spicing your own puts you in charge.