Careless tweets have landed a host of celebrities in trouble in the past with comedian Alan Davies, Sir Bob Geldof's daughter Peaches and Sally Bercow all finding themselves in legal difficulties due to their online posts.
Social media users have also found themselves in contempt of a court - nine people admitted naming the woman raped by footballer Ched Evans on Facebook and Twitter.
They were all told to pay the victim £624 each.
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Drivers of the most polluting vehicles will pay the new £10 T-Charge, meaning a daily payment of £21.50 to enter central London.
It is estimated there are 50,000 alcohol-related hospital admissions a year, costing the Welsh NHS £120m annually.
A rather cloudy start for most, with rain spreading eastwards, clearing to brighter skies later in the day.