You will have seen the recent news about drug testing now in force. Police officers now have new equipment and powers to detect drug use. What you should be aware of is that there are a number of prescription drugs which will now be tested for and can lead to prosecution. Please see the article on the GOV.UK website for details and check with your doctor if you are unsure.
Additionally, there have been calls for increased penalties for mobile phone use whilst driving. The Chief Constable responsible for roads policing in ACPO in calling for a two strike ban. This may be obvious, but using a mobile phone illegally while driving your car or truck may cost you your livelihood. See the full article on the Fleet News website.