A reliable cab service can prove five things: valid licensing and driver vetting, a track record of on time arrivals with flight monitoring, fixed pricing confirmed in writing, maintained and inspected vehicles, and a clear cancellation policy. Every one of these can be checked before you book, usually in a single phone call. Dot2Taxi has operated across Berkshire and Buckinghamshire since 1986 and meets all five as standard.
Most passengers judge a cab firm after the journey. By then it is too late. The useful assessment happens beforehand, and it takes about five minutes.
This checklist covers what to ask, what a good answer sounds like, and which vague responses are worth treating as a warning.
Licensing and Driver Vetting
Licensing is the foundation, and it is the easiest thing to verify.
What to check:
- The operator holds a current licence from a named local authority. Ask which one.
- The driver holds the correct licence for the vehicle they are driving.
- The vehicle displays a licence plate, usually on the rear exterior, stating the maximum passengers it may carry.
- The driver carries visible identification showing their name, licence number, and expiry date.
Driver vetting goes beyond the licence itself. A properly run operator will confirm without hesitation that their drivers hold enhanced background checks appropriate to carrying passengers, including children and vulnerable adults.
A detail worth knowing about private hire. For a private hire booking, the operator taking the booking, the driver, and the vehicle must all be licensed by the same authority. An operator licensed by one council cannot dispatch a vehicle plated by another. If you are booking with an unfamiliar firm, asking which authority licensed each of the three is a legitimate question.
Warning signs:
- No licence plate visible on the vehicle
- A driver who cannot produce identification
- Vagueness about which authority issued the operator licence
- Any suggestion that a vehicle can be hailed when it is a private hire booking, which is not legal
If any of those apply, do not travel.
On Time Performance and Flight Monitoring
Punctuality is what most passengers actually mean by reliable, and it is the hardest thing to assess before you book. There are still useful proxies.
Questions that reveal on time performance:
- Do you build buffer time into airport bookings, and how much? A firm that plans for delay rather than reacting to it will have an answer.
- What happens if the vehicle develops a fault an hour before pickup? A properly resourced operator has a replacement and a process. A single vehicle business usually has neither, however good their intentions.
- Will I receive the driver name and registration before arrival? Standard practice at good operators, and it removes the uncertainty of waiting outside at five in the morning.
- Where is the vehicle coming from? For an early departure, a vehicle setting off from another town has a journey of its own before yours begins.
Flight Monitoring: What It Actually Means
Flight tracking is claimed by almost every operator and delivered properly by fewer. The specific questions:
- Is tracking automatic on every booking, or applied on request? It should be automatic.
- Does the pickup adjust to actual landing time without me contacting anyone? That is the entire point of it.
- Are early arrivals covered as well as delays? A flight landing forty minutes early is just as disruptive as one landing late.
- What happens if my flight is diverted to another airport? There should be a defined process rather than an improvised one.
The waiting time question that catches people out. Ask when the free waiting period starts. There are three answers in common use: at scheduled arrival time, at actual touchdown, or when the passenger clears customs into arrivals. On a long haul flight the gap between the first and third is routinely over an hour, and that difference can exceed the fare itself.
Get the definition in writing.
Transparent, Fixed Pricing
Private hire fares are not set by local councils. That means the price is entirely at the operator’s discretion, and a written quote is your only protection if there is a dispute.
What a proper written quote includes:
| Element | What to confirm |
|---|---|
| Total fare | Fixed, not an estimate |
| Mileage | What is included and the rate beyond it |
| Waiting time | How much is free and the rate afterwards |
| Airport charges | Whether the Heathrow drop-off charge is included |
| Card payment | Accepted, and whether a surcharge applies |
| Return journey | Priced separately or included |
| Overrun | What happens if the day runs long |
The Heathrow drop-off charge is the most common surprise. Since 1 January 2026 it has been £7 per entry with a ten minute maximum stay, and it applies at every terminal twenty four hours a day. Some operators include it in the quote. Others add it at the kerb. Ask which.
Warning signs on pricing:
- A quote given verbally with no written confirmation
- “It’ll be around…” rather than a fixed figure
- Reluctance to itemise what is included
- Card payment surcharges disclosed only at the end of the journey
- Prepayment requested without a stated cancellation and refund policy
That last one matters more than it appears. If you are paying in advance, confirm in writing what happens if the journey is cancelled by either party.
Vehicle Standards and Cleanliness
Vehicle condition is the most visible quality signal and the one most passengers only assess once they are already sitting in the car.
What to ask before booking:
- How old is the vehicle, and when was it last serviced? A well run operator tracks this and answers immediately.
- Does it have working air conditioning? Worth asking explicitly for summer travel and any journey over thirty minutes.
- What is the luggage capacity? For airport work this matters more than seat count. A vehicle that seats four does not necessarily carry four large suitcases.
- Are child seats available, and how many? These must be arranged in advance rather than requested on the day.
Standards a professional operator should meet:
- Regular inspection. Vehicles carrying passengers commercially are subject to inspection requirements. A serious operator can describe their maintenance schedule.
- Hire and reward insurance. Any vehicle carrying passengers for payment must hold it. Standard private motor insurance does not extend to it.
- Interior condition. Clean, undamaged, and free of the previous passenger’s leavings.
- Consistency. The vehicle standard on a Tuesday morning should match a Saturday evening.
The subcontracting question. Ask whether the journey will be handled by the operator’s own vehicle and driver, or passed to another firm. Subcontracting is common at busy periods and is not inherently a problem, but it means the standards you were quoted may not be the standards that arrive. Ask which company will actually be coming.
Booking Flexibility and Cancellation Policy
The final section of the checklist covers what happens when plans change, which they frequently do.
What to establish before you book:
- How far ahead can I book? Most operators take bookings months in advance for airport work.
- How late can I book? Same day availability varies considerably between operators.
- Can I amend the booking, and up to when? Timings shift, particularly on airport journeys.
- What is the cancellation window and the charge beyond it? Get this in writing, especially if paying in advance.
- What happens if my flight is cancelled? A reasonable operator does not charge for a journey rendered impossible by an airline.
- How do I contact you on the day? A direct number rather than a general enquiry line matters at five in the morning.
The communication test. Before committing to a significant booking, judge the operator on how they handle the enquiry itself. Do they answer quickly? Do they confirm in writing? Do they ask the right questions about luggage, terminal, and passenger count? An operator who is vague at the enquiry stage will not become precise once you have paid.
Booking channels worth having. A firm that accepts booking by phone, email, and messaging gives you a written record when you want one and speed when you need it. Email confirmation is particularly useful when arranging travel on behalf of someone else.
The Five Minute Reliability Check
If you take nothing else from this guide, these six questions will separate a reliable operator from an unreliable one faster than any review page.
- Which authority licensed your operator, drivers, and vehicles?
- Is this price fixed and confirmed in writing, with everything itemised?
- Is the airport drop-off charge included or added afterwards?
- Is flight tracking automatic, and when does free waiting time start?
- Will this journey be subcontracted, and if so to whom?
- What happens if the vehicle develops a fault two hours before pickup?
An operator who answers all six clearly and without hesitation has thought about their service properly. One who deflects, delays, or says the driver will explain on the day has told you something useful.
Why Choose Dot2Taxi
Dot2Taxi has operated across Maidenhead, Windsor, Slough, Marlow, and High Wycombe since 1986, and every item on this checklist is standard rather than exceptional.
- Fully licensed and DBS checked drivers on every journey
- Fixed pricing confirmed in writing with all charges itemised before travel
- The Heathrow terminal drop-off charge included in the quoted price
- Automatic flight tracking on every airport collection
- Vehicles maintained and inspected to a consistent standard
- No journeys subcontracted to an operator you did not choose
- A direct contact available at the hours travel actually happens
- 24 hour availability, seven days a week
Nearly four decades in the same area means the practical detail is already understood rather than worked out on the day.
Conclusion
Reliability in a cab service is not a feeling. It is a set of specific, checkable things: the licensing, the pricing, the flight monitoring, the vehicle standard, and the terms when plans change.
Every one of them can be confirmed before you hand over a booking. The five minute conversation that establishes them is the single most useful thing a passenger can do, and almost nobody does it.
Ask the six questions. The operators worth booking will answer every one without pausing.
Frequently Asked Questions
How do I know if a taxi company is properly licensed?
Ask which local authority licensed the operator, the driver, and the vehicle. For private hire, all three must be licensed by the same authority. Licensed vehicles display a plate on the rear exterior, and drivers should carry visible identification showing their name and licence number.
What should a taxi quote include?
A fixed total, mileage allowance, free waiting time and the rate beyond it, any airport charges such as the £7 Heathrow drop-off fee, card payment terms, and what happens if the journey overruns. Get it in writing rather than agreed verbally.
When does waiting time start on an airport pickup?
It varies by operator, which is why it must be confirmed in writing. The three definitions in common use are scheduled arrival time, actual touchdown, and the point you clear customs. On a long haul flight the gap between them is routinely over an hour.
Is flight tracking standard with taxi companies?
It should be, but delivery varies. Ask whether tracking is automatic on every booking or applied on request, whether early arrivals are covered as well as delays, and what happens if your flight is diverted. Dot2Taxi tracks every airport collection automatically.
Should I ask whether my journey will be subcontracted?
Yes. Subcontracting is common at busy periods and is not inherently a problem, but it means the vehicle and driver standards you were quoted may not be what arrives. Ask which company will actually be coming.
What are the warning signs of an unreliable taxi firm?
No visible licence plate, a driver without identification, a verbal quote with no written confirmation, reluctance to itemise charges, card surcharges disclosed at the end of a journey, and prepayment requested without a stated cancellation policy.
