Black Cab Tour or Hail a Taxi? How London's Licensed Taxis Work
You can walk into the street, put your hand out, and be in a black cab in under a minute. So why book one? The honest answer is that sometimes you should not — and knowing exactly where the line falls is worth more than any sales page.
Three different things that all look alike
London has three kinds of car with a driver in it, and they are not interchangeable.
- A black cab is legally a hackney carriage. It can be hailed in the street, it runs on a meter, and its driver has passed the Knowledge of London.
- A minicab is a private hire vehicle. It must be booked through a licensed operator in advance, it cannot be hailed, and its driver has not sat the Knowledge.
- A booked cab tour is a black cab and its driver hired for a fixed block of hours at a fixed price, with the meter off and a route prepared.
Can you hail a cab and ask for a tour?
You can ask, and some drivers will do it. What you get is a metered journey with commentary, which is a different product in three ways that all cost you money.
The meter runs on time as well as distance, so every minute you spend photographing Buckingham Palace is charged. The driver has not planned a route, so you get their default one. And there is nothing to stop the fare climbing past what a booked tour would have cost, because nobody agreed a price at the start.
What the meter does, and why it matters here
A London taxi meter charges for distance and for time, and in slow traffic the time element dominates. Sightseeing is by definition slow: you stop, you wait, you double back. Those are the exact conditions a meter is least kind to.
A booked tour turns that off. The price is agreed before you start, the driver waits at each stop without the meter moving, and a traffic jam is their problem rather than yours. That is most of what you are paying for.
What does the Knowledge actually buy you?
More than a route. Transport for London sets a book of 320 routes and requires the streets and landmarks within a quarter-mile of each end of every one, across a six-mile radius of Charing Cross. It typically takes three to four years.
The practical result is a driver who can be redirected without losing the thread. Ask for the City churches, the Roman wall, or the street where a film was shot, and it happens — which is exactly what the reviews describe. The whole licence is set out on the black cab page.
Black cab, minicab, ride-hailing: what actually differs
| Black cab | Minicab or app | Booked cab tour | |
|---|---|---|---|
| Can be hailed | Yes | No | Booked in advance |
| Driver has the Knowledge | Yes | No | Yes |
| Price agreed up front | No, metered | Usually | Yes |
| Waits at stops without charging | No | No | Yes |
| Wheelchair accessible | Always | Not required | Always |
| Pays the Congestion Charge | No | Yes | No |
| Route prepared for sightseeing | No | No | Yes |
When doing it yourself is the right answer
Three situations, and none of them is a failure of the format.
You are alone and on a budget. A whole cab fare split one way is a lot. Buy a bus ticket, or walk Westminster and take the Underground east.
You want to go inside things. No fare here includes admission anywhere, and one tour says so in its own exclusions block. A day built around the Tower and Westminster Abbey is a day of tickets and queues, and a cab waiting outside is money standing still.
You have a week and no plan. Flexibility is worth real money, and a fixed three-hour block on a loose week is the wrong shape.
When a booked tour is worth the money
Also three, and they are the mirror image.
There are three or more of you. The fare hires the vehicle, so it divides. At four people a three-hour tour is about $108 each; at six it is $72.
Your time is short. Two hours in a cab covers what a day on foot manages, and it tells you which two places are worth going back to.
Somebody in the party cannot walk far. Every licensed London taxi has a ramp and a wheelchair bay, by Transport for London requirement, and the reviews describe drivers doing considerably more than the minimum.
What about a private car and driver?
It exists, it costs more, and it buys you less here. A private hire car cannot use bus lanes, pays the Congestion Charge and the Ultra Low Emission Zone charge, is not required to be wheelchair accessible, and its driver has not sat the Knowledge.
The one thing it does better is capacity: a people carrier takes more than six. If your party is larger than a cab, that is the reason to look at one, not the guiding.
What it costs to get this wrong
Not much, which is the reassuring part. Every tour listed here refunds in full if you cancel at least 24 hours before the start, so booking one and changing your mind costs nothing at all. Hailing a cab and finding the driver has no interest in guiding costs you one fare across town.
The expensive mistake is the third one: booking a private car and driver because it looked similar, and discovering it cannot use the bus lanes, pays both road charges, is not required to carry a wheelchair, and comes with a driver who has never sat the Knowledge. That is the version where you pay more for less, and it is the reason this page exists.
What a booked tour includes that a hailed cab never will
- A price agreed before you get in, with free cancellation at 24 hours.
- A driver who has thought about the route, and often carries photographs or film clips for the stops.
- Pickup at your door and a drop-off wherever you name.
- Fuel, parking and tolls inside the fare on several of these tours.
- The waiting, at every stop, without the meter moving.
Is a driver-guide the same as a Blue Badge guide?
No, and the difference is worth understanding rather than worrying about. Passing the Knowledge of London makes somebody an expert in the streets and licenses them to carry you. A Blue Badge is a separate tourist-guiding qualification, awarded after its own training, and it is what a walking guide in a museum will hold.
Some drivers hold both. One tour listed here names the badges it employs — Blue Badge, City of London, City of Westminster, and Clerkenwell and Islington — and it is the Christmas lights run, where the guiding is most of the product. The rest guide as licensed cabbies, which is what the trade has done for centuries, and the reviews suggest the individual matters far more than the badge.
What the badge does change is depth on a themed route. If you are booking a Beatles or a film-location day and the commentary is the reason, ask what the driver's background is when the operator makes contact. The whole licensing picture is on the black cab page.
How to tell a licensed cab from everything else
A licensed London taxi carries a licence plate on the back, a lit sign on the roof when it is free, and a driver wearing a badge. If a car pulls up and offers you a ride you did not book, it is neither of the three things at the top of this page. What each of these tours provides is set out on the planning page.
Frequently asked questions
What is the difference between a black cab and a minicab?
What is the Knowledge of London and does my driver have it?
Is the driver a qualified guide?
Are black cab tours wheelchair accessible?
Do I need to tip the driver?
If a booked tour is the answer, which tour to book sorts them by hours and theme, and the private black cab tours of London are all listed with their fares on Black Cab London Tours.
Tours where the booking is worth it

London Private Black Cab Tour: 2 hour highlights/hotel pick-up
Two hours at a fixed price, with the cab waiting at six stops and the meter nowhere in sight.
From $304 per group, up to 6
Check AvailabilityLondon: Iconic London Taxi Tour - Private 3-Hour Tour
An electric cab with a hearing induction loop, and a driver-guide who is also a qualified taxi guide.
From $419 per group, up to 6
Check Availability
Bespoke London Black Taxi Tours
Four, five or six hours shaped around a list you hand over first, with snacks and water aboard.
From $606 per group, up to 6
Check Availability