If it feels harder to flag down a black cab in London than it used to be, that isn't nostalgia. The number of licensed taxi drivers in the capital has fallen below 17,000 — the lowest figure since the late 1970s. At its peak the trade was substantially larger, and the decline has been steady rather than sudden.
That has practical consequences for anyone who relies on stepping outside and raising an arm.
Why the numbers have fallen
Several pressures have compounded, and no single one explains it.
The Knowledge is a serious barrier to entry. Becoming a London black cab driver means learning tens of thousands of streets and thousands of landmarks in detail, a process that typically takes years of unpaid study. Recruitment has struggled to replace drivers leaving the trade.
The existing workforce is ageing. A large share of licensed drivers are in the later part of their careers, and retirements have outpaced new entrants for years.
Vehicle costs are high. London's licensing rules require purpose-built, wheelchair-accessible, zero-emission-capable vehicles. That is good for accessibility and air quality, but the cost of a compliant cab is a substantial barrier for a new driver.
Private hire expanded enormously. App-based and traditional private hire grew into a far larger trade over the same period, giving would-be drivers a route into the industry that doesn't require the Knowledge or a purpose-built vehicle.
Where you'll actually notice it
The shortage isn't evenly distributed, which is why some people barely notice it and others find it genuinely disruptive.
- Outside central London. Cab density has always concentrated in the centre and around major hubs. In outer boroughs, hailing was never reliable and has become less so.
- Late at night. Fewer drivers working nights means the gap between "I want to leave" and "a cab appears" widens considerably after the evening peak. Our late night taxi guide covers planning around this.
- In bad weather. Rain has always thinned availability. With a smaller fleet, the effect is sharper.
- When events end. A stadium or arena emptying puts thousands of people onto the street simultaneously — see our event and stadium taxi guide for how to plan pickups around road closures.
- At airports, in the other direction. Getting a cab to an airport from an outer address is harder than getting one from the rank at the terminal.
What this doesn't mean
It's worth being accurate rather than alarmist. Black cabs have not disappeared, and in central London during daytime hours you will generally still find one. The trade remains a licensed, regulated, wheelchair-accessible option with drivers who know the city unusually well.
What has changed is reliability of hailing as a plan. Treating "I'll grab a cab" as a guaranteed fallback is riskier than it was a decade ago, particularly outside the centre and outside daytime hours.
How to plan around it
The practical response is straightforward: for any journey where the timing actually matters, book ahead rather than relying on availability at the moment you need it.
For flights. This is the clearest case. An airport transfer has a hard deadline you cannot renegotiate, and hailing is the wrong tool. Pre-book, give your flight number, and let the pickup adjust to your real arrival time. See our guides for Heathrow, Gatwick, Stansted and Luton, or get an estimate for the common Heathrow to central London run.
For appointments and events. Anything with a fixed start time — a medical appointment, a train connection, a wedding — is worth booking rather than hoping.
For late nights. Book the return leg at the same time as the outbound. Deciding at 01:00 that you'd like to leave is the moment availability is worst.
For groups. A larger vehicle is not something you can hail. If there are more than four of you, or you have significant luggage, it needs booking — our group and minibus guide covers the real capacity splits.
Black cab or private hire?
Both remain licensed and regulated, and the choice is genuinely situational rather than one being better.
A black cab is metered, can be hailed, and is always wheelchair accessible. If you're in central London, it's raining lightly, and one is right there, taking it is a perfectly good decision.
A pre-booked private hire car gives you an estimated price up front, a confirmed pickup time, and a vehicle sized to your group. For planned journeys — the kind where being left waiting has a real cost — that predictability is the point.
Our taxi vs Uber guide sets out how the categories differ under UK licensing, and the London taxi cost breakdown covers how metered and quoted pricing compare in practice.
Frequently asked questions
Q: How many black cab drivers are there in London? A: Fewer than 17,000 licensed drivers, which is the lowest number since the late 1970s. The figure has been declining steadily for years as retirements outpace new entrants.
Q: Why are there fewer black cabs in London? A: A combination of factors: the Knowledge takes years of unpaid study, the existing driver workforce is ageing, compliant zero-emission-capable vehicles are expensive, and the private hire trade expanded rapidly as an alternative route into the industry.
Q: Is it still possible to hail a black cab in London? A: Yes, particularly in central London during the day. It has become less reliable outside the centre, late at night, in bad weather, and when large events finish.
Q: Should I pre-book instead of hailing? A: For any journey where timing matters — flights, appointments, events, late-night returns — pre-booking is the more dependable option. For a short, spontaneous central London hop in daylight, hailing is still reasonable.
Q: Are black cabs being replaced by driverless taxis? A: Not currently. Robotaxi services in London are small, supervised trials in limited areas with a licensed driver present. See our guide to driverless taxis in London for what has actually been approved.
If your journey has a time you can't miss, get an estimated fare and book it in rather than leaving it to chance on the kerb.