Using your mobile phone while driving
This article comes as two versions in one 
Version 1, the short version is quite simple . .
Do not use your mobile phone while driving ! Easy. Simple.
Version 2 - the longer version . . .
It is illegal to use your mobile phone while driving a car, van, lorry (HGV), or motorcycle unless you have hands-free access to said mobile phone.
Yes, the law still applies if you are:
- Stopped at traffic lights;
- Queuing in traffic;
- Supervising a learner driver;
The penalties for being caught breaking the law in this matter (as at 29 May 2017) are:
- 6 Penalty Points;
- £200 fine;
You can also be taken to court. If this occurs you can; 
- Be banned from driving;
- Receive a £1000 Fine (£2500 if driving a lorry or bus);
If you have passed your driving test within 2 years of being caught on your mobile phone, you can:
- Lose your licence;
The UK Government article is a good one: Mobile phones when driving - the law
Having a Smartphone can be a good idea - so can being Phone Smart.
The Road Safety Charity Brake have a good campaign. Check their following campaign: Be phone smart.
Article Author's personal opinion
If your career, income, lifestyle, relationships and anything else relies on looking after your driving licence:
LOOK AFTER IT THEN !