Is there wifi in a chauffeur car?

The usual places: cuttings and tunnels, the Chilterns on the M40, stretches of the M6 through the north-west hills, and almost anything in the Highlands north of Perth. None of that is new, and none of it is going to be solved by an aerial on a car.

Journey planning helps more than equipment. A call scheduled for the first hour out of London is far more likely to survive than one scheduled for the middle of a Pennine crossing, and the chauffeur can tell you which is which.

Power, quiet and space. An S-Class or a BMW i7 gives you a rear compartment you can work in for three hours without your back complaining, and cabin noise low enough that a call sounds like an office.

The chauffeur is the other reliable component. No conversation unless you start one, no radio unless you ask, and a route chosen to keep the ride smooth when you are typing rather than to shave two minutes off the arrival.

Say so when you book. Where a passenger genuinely has to hold a call for the whole run, the route can be planned around coverage rather than purely around speed, and the chauffeur will flag the dead stretches before you reach them.

For anything truly critical, a stop is more reliable than a moving car. Ten minutes at a service area with a stable connection beats forty minutes of a call breaking up, and on an hourly booking it costs nothing extra.