Trick-or-treating in Britain runs on convention rather than rules, and the conventions are not written down anywhere — which is why it generates so much low-level friction every year.
Here is how it actually works.
What time?
There is no legal restriction. No law sets trick-or-treating hours in the UK.
The convention that has settled is roughly 6pm to 8pm, and it is a good one. Before dusk feels premature; after eight you are knocking on doors where people have put small children to bed, and the reception cools sharply.
If your children are very young, go out at dusk or just before — around 5.30 to 6.30. Older children can go later, but 8pm is a sensible hard stop.
The lit-house convention
This is the single most useful piece of etiquette in Britain, and it works in both directions:
A decorated house, or one with a lit pumpkin outside, is inviting callers. A dark house with no decorations is not.
Teach children this and most of the problem disappears. Do not knock on undecorated houses. Do not knock where there is a "no trick or treat" notice — several police forces distribute these posters each October, and many councils publish printable versions.
Do not knock at a house where you can see nobody is in, and do not knock twice.
Opting out
Entirely reasonable, and easily done:
- No decorations, front light off. That is the recognised signal
- A printed notice if your street is busy — polite and effective
- Some people leave a bowl out with a note; it works in some streets and is emptied by the first caller in others
You are not obliged to participate. The signal system exists precisely so that nobody has to answer the door to opt out.
For parents
- Go with under-elevens. Older children in groups are generally fine, but agree a route and a time
- Take a torch and put something reflective on younger children. Costumes are almost universally dark, and it is dark at six
- Check the sweets before they are eaten, particularly anything unwrapped
- Stick to streets you know, and ideally to your own
- Watch costume length — trailing capes and kerbs do not mix well in the dark
- Agree in advance that you will only call at decorated houses, and hold to it
If you are handing out
- Keep the path lit and clear. Frightening callers is fine; a genuine trip hazard is not
- Have a non-chocolate option. Nut allergies are common and chocolate is the usual culprit
- Small individually-wrapped items are easier than anything loose
- Consider the teal pumpkin convention — a teal-painted pumpkin signals that you have allergy-safe alternatives. It is an American import but a sensible one, and it is spreading here
- Do not over-frighten small children. A four-year-old who has come to your door in a pumpkin costume does not want a jump scare
Sweets and pets
If you have a dog, the doorbell going forty times in two hours is a genuinely difficult evening for them, and chocolate, raisins and anything sweetened with xylitol are toxic to dogs. Keep the bowl well out of reach. There is more on pets here.
The older version
What British children traditionally did was not this. In Scotland they went guising — arriving in disguise and performing a song, poem or joke before being paid. In England the tradition was souling, where callers offered prayers for the household's dead in exchange for spiced cakes.
Both involved giving something at the door rather than simply asking. If you want to bring a bit of it back, ask the children for a turn before you hand anything over. In Scotland they will be expecting it, and the jokes are worth hearing.
Kit
Costumes that go over a coat, buckets, torches and glow sticks are in the Kids & Trick-or-Treat section. And if the adults want the frightening version once the children are in bed, that is what the directory is for.