You
MUST exercise proper control of your vehicle at all times. You
MUST NOT use a hand-held mobile phone, or similar device, when driving or when supervising a learner driver, except to call 999 or 112 in a genuine emergency when it is unsafe or impractical to stop.
Never use a hand-held microphone when driving. Using hands-free equipment is also likely to distract your attention from the road. It is far safer not to use any telephone while you are driving or riding - find a safe place to stop first or use the voicemail facility and listen to messages later.
You may park your vehicle using a hand-held remote control app or device. The app or device
MUST be legal, and you should not put other people in danger when you use it.