UK Child Seat Laws for Taxis and Minicabs

Families travelling to or from a London airport by minicab face a legal question that most transport guides do not answer clearly: are child seats required in taxis and private hire vehicles, and what happens if one is not available? The answer differs depending on the child's age, and the rules for licensed private hire vehicles are not the same as for private cars. This guide sets out the exact legal position, what parents must do before booking a London airport transfer, and what the law permits when no seat is provided.

What UK Law Says About Child Seats in Taxis and Minicabs

UK law requires all children under 12 years old or shorter than 135 cm to use the correct child restraint in most vehicles. The driver is legally responsible for ensuring children under 14 are correctly restrained. However, licensed taxis and minicabs — formally called private hire vehicles (PHVs) — carry specific exemptions that do not apply to private cars.

The law divides children into two groups for this purpose:

Age group	Standard requirement	Exception in licensed taxi/PHV	Responsibility
Under 3 years	Correct child car seat — front and rear	May travel unrestrained in the rear ONLY if no seat is available. This is a practical exception, not a safety recommendation.	Driver
3 to 11 years (or under 135 cm)	Correct child restraint in front and rear	If no child seat available: may use adult seatbelt in the rear of a licensed taxi or PHV	Driver
12–13 years (or over 135 cm)	An adult seatbelt must be worn if fitted	No specific PHV exception — seatbelt law applies	Driver
14 years and over	An adult seatbelt is fitted	Responsibility shifts to the passenger	Driver

Source: GOV.UK Child Car Seats Law; RoSPA/childcarseats.org.uk (© RoSPA 2026)

The critical point for parents: the legal exemption does not mean a journey without a child seat is safe. It means the driver is not penalised in that specific scenario. The responsibility for ensuring a seat is available — by requesting one at booking — falls on the parent or guardian.

What the PHV Exemption Actually Means — and What It Doesn't

The private hire vehicle exemption was introduced for practical, not safety, reasons. It acknowledges that a licensed minicab cannot always carry child seats of every type and size on demand. It does not change the physical risk to a child travelling unrestrained.

In practice, the exemption operates as follows:

Children under 3: If no appropriate seat is available in a licensed taxi or minicab, the child may travel unrestrained in the rear only. They cannot travel in the front without a seat. This is the only scenario where an under-3 can legally travel without a restraint in a PHV.
Children aged 3 and above (up to 12 or 135 cm): If no child seat is available in a licensed PHV, they must use the adult seatbelt in the rear. They must not travel unrestrained.
"Not available" means genuinely unavailable: If you have not requested a child seat at booking and the driver does not have one, the exemption applies. But this is an avoidable situation — operators who offer child seats on request are eliminating the need to invoke the exemption at all.

The fixed penalty for a driver failing to ensure correct child restraint is £100, rising to £500 if taken to court. The driver's insurance may also be affected. Invoking the exemption shifts the driver's liability but does not remove the parent's duty of care.

Which Child Seat Type Does Your Child Need?

The correct seat type is determined by your child's weight, not age alone. Age is a rough guide — always check the weight range marked on any seat you use.

Group	Weight range	Typical age	Seat type
0 / 0+	Up to 13 kg	Birth to ~12–15 months	Infant carrier (rear-facing only)
1	9–18 kg	9 months to ~4 years	Forward-facing with harness
2	15–25 kg	~4–6 years	High-back booster with belt
3	22–36 kg	~6–11 years (over 125 cm)	Backless booster cushion (belt-only)

Many minicab operators provide Group 1 forward-facing seats and Group 2/3 booster cushions. Infant carriers (Group 0/0+) are less commonly carried because they require ISOFIX anchor points or a specific belt-routing path. If you are travelling with a baby under approximately 13 kg, always confirm the specific seat type available — and whether the vehicle has rear ISOFIX points — at the time of booking.

ISOFIX in Minicabs: What to Check Before You Book

ISOFIX is a standardised anchoring system built into most cars manufactured from 2003 onwards. It provides a rigid connection between the child seat and the vehicle frame, removing the risk of incorrect belt routing. ISOFIX is the safest fitting method for most child seats.

Not all minicabs have ISOFIX anchor points, and not all child seats require them. Here is what to confirm when booking a child seat with a private hire operator:

Does the vehicle have rear ISOFIX anchor points? (Not all estates and MPVs do.)
Is the child seat being provided ISOFIX-compatible, belt-only, or both?
If you are bringing your own ISOFIX seat, does the specific vehicle model support it? ISOFIX compatibility varies even between cars of the same make.
Is a top tether anchor point available? Some Group 1 forward-facing ISOFIX seats require a top tether for correct installation.

MiniCab Lane operators can confirm vehicle ISOFIX availability at the time of booking. If you own a seat and want to bring it, this is always the safest option — your seat is correctly sized for your child and already familiar to you.

Child Seats and London Airport Transfers: What to Book and Where

Airport transfers present a specific challenge for families: luggage is heavier, journeys are longer, and the stress of catching a flight reduces the margin for error at pick-up. The correct approach is to request a child seat at the point of booking — not at the point of pick-up. MiniCab Lane offers child seats on request across all London airports.

Airport	Transfer time	Child seat available?	Book
Heathrow (LHR)	45–60 min	Yes — request at booking	Heathrow Airport Taxi
Gatwick — South (LGW)	55–75 min	Yes — request at booking	Gatwick South Terminal
Gatwick — North (LGW)	55–75 min	Yes — request at booking	Gatwick North Terminal
Stansted (STN)	60–75 min	Yes — request at booking	Minicab London Stansted
Luton (LTN)	60–80 min	Yes — request at booking	Minicab London Luton
London City (LCY)	25–40 min	Yes — request at booking	London City Airport Taxi

For Heathrow specifically, always confirm your terminal when booking. Child seat pick-up logistics differ slightly by terminal approach road — Terminal 2, Terminal 3, Terminal 4, and Terminal 5 each have separate pick-up forecourts.

Frequently Asked Questions

Do taxis legally have to provide a child seat in the UK?

No. Licensed taxis and private hire vehicles are not legally required to provide child seats. They are legally required to ensure correct restraint — but the law provides an exemption when a suitable seat is not available. Children under 3 may travel unrestrained in the rear; children aged 3 and over must use the adult seatbelt in the rear if no child seat is provided.

Can a baby travel in a minicab without a car seat?

Under UK law, a baby under 3 may travel unrestrained in the rear of a licensed taxi or minicab if no child seat is available. This is a legal exemption, not a safety recommendation. Parents should always request a child seat at the point of booking to avoid relying on this exemption.

What happens if I bring my own child seat to a London airport transfer?

You are permitted to use your own child seat in a minicab, subject to the driver confirming it is compatible with the vehicle's seat belt or ISOFIX system. Bringing your own seat is the safest option, as it is correctly sized for your child and you know it is in good condition. Confirm with the operator at booking that they can accommodate your seat type.

Is a booster cushion (backless booster) legal in a minicab?

Yes, for children in Group 3 (22–36 kg, typically over 125 cm). However, since September 2017, new backless booster seats can only be sold if they meet the i-Size (R129) standard. Older backless booster cushions approved under R44 remain legal to use. If you are purchasing a new seat, ensure it meets the current standard.

Who is responsible if a child is unrestrained in a minicab?

The driver is legally responsible for ensuring children under 14 are correctly restrained. If the driver invokes the PHV exemption because no seat is available, and the child travels on the adult seatbelt or unrestrained (under 3 only), the driver's liability under the exemption applies. The parent, however, retains a duty of care and should always arrange a child seat in advance rather than relying on the exemption.