As of 1st March 2017 if you are caught using a mobile handset whilst driving the penalty has doubled to £200 and six points on your licence. Drivers who are caught using a phone within two years of passing their driving test will have their licence revoked and any drivers who have six points or more on their licence must retake their practical and theory driving test.
You must not use hand-held phones whilst driving – this includes use of phones whilst stopped or queuing in traffic. You should switch off your mobile phone whilst driving or place your phone out of reach or let a passenger make or answer a call on your behalf if necessary. An exception is made in the event of a genuine emergency for calling the emergency services on 999 where it is unsafe or impracticable to cease driving in order to make the call.