Guide · UK sources · checked 5 October 2026

Collars, harnesses, leads and travelling safely.

What you walk and travel with matters for comfort, safety and the law. Here is what UK charities and the Highway Code say.

Collar, tag and harness

Dogs Trust says a harness lowers the risk of neck injury, but a dog in public should also wear a collar with an ID tag, even when wearing a harness. GOV.UK’s microchipping page says a dog must wear a collar and tag with the owner’s name and address in public, in addition to being microchipped.
A good fit leaves about a finger’s width under the straps and should not shift as the dog moves (Dogs Trust).
Introduce a harness with scattered treats so the dog links it with nice things. A harness does not teach lead manners; that needs separate training.

Walking nicely on a lead

Dogs Trust suggests a flat harness or collar that is comfortable, warns that some equipment hurts when a dog pulls, and recommends rewarding the dog for staying close, stopping when the lead tightens and moving on when it slackens, without jerking. Dogs pull because it has worked before, so consistency matters. The RSPCA describes prong collars as painful devices that can injure the neck, spine and windpipe, says aversive methods can harm welfare, and recommends reward-based training with a well-fitting harness.

We have not summarised the law on electronic collars because the sources we checked disagreed and the legal status may differ between England, Scotland and Wales. Check GOV.UK or the relevant government page directly before buying any such device. We found no UK source in this set on retractable leads, so we offer no view on them.

On the road

Rule 57 of the Highway Code says to make sure dogs are suitably restrained so they cannot distract you or be hurt, or hurt others, if you stop quickly. The Highway Code applies in Great Britain. It lists a seat-belt harness, pet carrier, dog cage or dog guard as examples. Rule 56 says not to let a dog out on the road on its own and to keep it on a short lead on pavements, roads and paths shared with cyclists or horse riders.

Dogs Trust adds: build positive associations with the car in stages, drive smoothly, include toilet and exercise breaks, never leave a dog alone in a car, and never force a fearful dog to travel; ask a behaviourist for help if needed.

Sources

Limits: general information; rules differ across the UK and change. No product or brand is recommended and nothing here changes breed matching.

← Getting ready for your dog