The riskiest part of a solo trip is arrival
Not the nightlife, not the tube, not walking home. Arrival. You are jet-lagged, carrying everything you own, unfamiliar with the geography, possibly without working mobile data, and visibly a new arrival. Every decision you make in that first hour is made with the least information and the least energy you will have all trip.
This is why pre-booking the first journey matters more than any other single precaution. It converts the highest-risk moment into an administrative one. You are not choosing a car on a kerb at midnight, you are walking to a driver whose name, photograph and registration you already have.
Verify the driver, not the car
Anyone can hold a sign. The verification sequence that actually works is short and worth making automatic.
Let them say your name first. Do not walk up and announce who you are. Ask "who are you here for?" A genuine pre-booked driver has your name and flight number on their job sheet.
Check the registration against your confirmation. Before you put a bag in the boot, not after. If it does not match, phone the operator rather than the driver.
Ask to see the badge. Licensed private hire drivers carry a photographic badge. Asking is routine and no legitimate driver is offended by it.
Ignore anyone who approaches you. Soliciting fares in an arrivals hall is illegal. Your driver waits for you; they do not work the crowd.
Things worth setting up before you fly
Data connectivity is a safety feature, not a convenience. An eSIM activated before departure means you land already connected, which means live maps, live location sharing and the ability to phone an operator without hunting for airport wifi. It is the cheapest safety purchase available.
Share your itinerary with one person who will actually notice if it changes. Not a group chat, one person. Send them the flight number, the accommodation address and the transfer confirmation. Live location sharing during journeys costs you nothing and means someone can see the route in real time.
Keep money in two places. A card in a bag and a card somewhere on your person, plus enough cash for one journey. Being able to leave a situation without needing to find an ATM is the whole point.
In the car
Sit in the back, on the side opposite the driver. It is the default in the UK, so it signals nothing unusual, and it gives you the clearest sightline and the easiest exit. Keep your phone charged and out. Follow the route on your own map rather than trusting the direction of travel feels right, because a diversion for genuine traffic and a diversion for any other reason look identical from the back seat.
You are under no obligation to make conversation, to answer personal questions, or to say whether you are travelling alone or where you are staying beyond the drop-off address. A vague answer is a complete answer. Most drivers are making small talk out of boredom, and the ones who are not will read a short reply correctly.
If something feels wrong, act early and unapologetically. Ask to stop somewhere busy: a petrol station, a hotel forecourt, a lit high street. You do not need a justification and you do not owe an explanation. Ending a journey early costs a fare. That is all it costs.
Late arrivals and early departures
Flights that land after midnight or leave before six create the situations where public transport is thin and decision-making is worst. Night tube coverage is partial and does not run every night. Rail replacement buses at those hours leave you standing on unfamiliar pavements. A booked door-to-door car is a materially different experience at 2am than at 2pm, and it is the one journey where paying for the certainty is easiest to justify.
If you are arriving very late, tell your accommodation. Hotels with staffed night desks are worth choosing over keycode entries for the first night specifically.
Around the city
Contactless works on all tube, bus, tram, DLR and Overground services, so you never need to stand at a machine working out a fare while your bags are unattended. Buses are slower than the tube but you can see out of them, which many solo travellers prefer at night. Licensed black cabs can be hailed on the street; unbooked private hire cars cannot legally pick you up, so a car that stops when you wave at it and is not a black cab should be waved on.
Walking in central London at night is normal and widely done. The usual sense applies: main roads over shortcuts, headphones out or on one ear, phone not in your hand at a junction.