October half term sits in the worst possible week for packing. It can be sixteen degrees and bright or six degrees and horizontal rain, sometimes in the same afternoon. And unlike a summer holiday, you cannot solve it by taking more of the same thing.

Pack a system, not outfits

The instinct is to plan a set of outfits, one per day. It fails for two reasons: the weather refuses to co-operate, and something gets ruined on day two.

What works instead is a small number of interchangeable layers where everything goes with everything. In practice that means picking two neutrals — say navy and grey, or brown and cream — and making sure every item is one of those two or a colour that works with both.

The test is simple: if you can pull any top and any bottom out of the bag in the dark and they work together, the packing is right.

The three-layer rule

For a British October, every person needs exactly three things that can be worn together or separately:

  1. A base — long-sleeved, thin, worn every day.
  2. A mid — a fleece or a jumper, on and off constantly.
  3. A shell — genuinely waterproof, with a hood.

That covers roughly six degrees to sixteen without any additional decisions. Anything beyond it is redundancy, not capability, which is a useful distinction when you are counting bags.

What this replaces is the thick coat. One heavy coat handles one temperature; three thin layers handle five, and they pack smaller.

Adults: five days from seven items

  • Two pairs of trousers, one of which can get muddy
  • Three tops, all in the same colour family
  • One jumper
  • One waterproof
  • Boots, plus trainers
  • One thing for dinner out that is not any of the above

Socks and underwear scale with days. Everything else does not, and this is the number people consistently get wrong — five tops for five days is packing for a life without laundry that you would not lead at home either.

Children: the honest version

Children need more than adults, proportionally, and there is no clever way around it. What you can do is change what kind of more.

  • Double the trousers, not the tops. Trousers are what get soaked and muddy.
  • Everything dark or patterned. Pale colours photograph beautifully and last forty minutes.
  • Two pairs of shoes minimum, because wet shoes do not dry overnight in a rental.
  • One complete change per child in the day bag, not the boot.

The last one is the difference between a minor incident and the end of the outing.

What to leave

  • The second coat. The layer system replaces it.
  • Anything white.
  • Nice shoes you would be sad about.
  • Hair dryers, irons, and most of what you think the rental will not have. Check first; most have both.
  • More than one bag per person, which is a rule that enforces all of the above.

The thing worth buying before you go

If the waterproofs are not genuinely waterproof, the whole system falls apart, and October is when you find out.

A shell that wets through turns three layers into three wet layers. If yours is more than a few years old or was never taped-seam to begin with, it is the one thing worth replacing before half term rather than after — and it is the kind of purchase where the price spread between shops is wide for what is often a similar garment. DUPI takes a photo of one you have seen and finds the closest matches at prices that are actually listed.