Using a hands-free phone is likely to

Explanation: Unlike someone in the car with you, the person on the other end of the line is unable to see the traffic situations you are dealing with. They will not stop speaking to you even if you are approaching a hazardous situation. You need to be concentrating on your driving all of the time, but especially so when dealing with a hazard.

Category: Alertness

References: The Official DVSA Guide to Driving: Section 1, Highway Code: Rule 149