The Government advises people should not regularly drink more than the guidelines of three to four units of alcohol for men a day, and two to three units of alcohol for women a day.
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Paramedics were on standby outside the police cordon as armed officers stood by the property.
A team of researchers has taken samples from the ten busiest London Underground lines to work out which are the dirtiest.
The action comes on top of an emergency timetable which has seen hundreds of trains a day being axed.