Cycling in the UK: what the law requires and what it only advises

British rules use two different words, and the gap between them can cost you a fine. Where the Highway Code says MUST, it is the law, with a citation to the relevant act underneath. Where it says should, it is advice, and no penalty follows. For cyclists this matters, and the best-known misunderstanding comes from exactly this distinction.

Is a helmet compulsory?

No. Rule 59 is worded as advice: you "should wear a cycle helmet that conforms to current regulations, is the correct size and securely fastened". That is a should, not a MUST. The law does not require it, though the Code states plainly that a correctly fitted helmet may reduce the risk of head injury in certain circumstances.

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So what is compulsory?

Lights. Rule 60: at night your cycle MUST have white front and red rear lights lit. It must also be fitted with a red rear reflector, and with amber pedal reflectors if it was manufactured after 1 October 1985. This is a MUST, cited to the RVLR regulations.

Flashing lights are permitted. But in areas without street lighting the Code recommends a steady front lamp as well.

Can you cycle on the pavement?

No. Rule 64: you MUST NOT cycle on a pavement. Another MUST, cited to the Highways Act 1835 and the Roads (Scotland) Act.

Crossings

Here is the detail many riders miss. Rule 81: do not ride across a pelican, puffin or zebra crossing — dismount and wheel your cycle across. Equestrian crossings are for horse riders only.

The exception is a toucan crossing: cyclists are permitted to ride across it (rule 82). At cycle-only signalled crossings you must not cross until the green cycle symbol shows.

And the rule shared with drivers: you must not cross the stop line when the lights are red (rule 71).

Bus lanes

Most bus lanes may be used by cyclists where signs say so (rule 65). One specific warning from the Code: do not pass between the kerb and a bus when it is at a stop.

Electric bikes: where the line falls

An electric bike that counts as a bicycle in law is an EAPC. The conditions are strict:

• the rider is at least 14;
• the motor has a continuous rated power output of no more than 250 watts;
• the motor must not propel the bike above 15.5mph;
• markings on the bike must show the power output and the manufacturer, plus either the battery voltage or the maximum speed.

Meet all of that and no licence is needed, and the bike does not need to be registered, taxed or insured. Throttle assistance without pedalling up to 15.5mph is allowed only on approved models.

And if the bike is more powerful?

Then it stops being a bicycle and counts as a motorcycle or moped. It must be registered and taxed, the rider needs a valid driving licence, a motorcycle helmet meeting British safety standards and insurance. Ride it uninsured and you may get a fine or have the bike seized by the police. It may also only be ridden on the road — cycle tracks and lanes are closed to it.

Hence the practical advice before buying: check the power marking on the frame before you pay. A seller may call it an electric bike, but if the motor exceeds 250 watts, in British law you are buying a moped.