http://www.theherald.co.uk/news/72243.html
DOUGLAS FRASER
"Scottish prisons are reforming their drug-testing regime and stepping up security after a damning report on their own staff's concerns about heroin use behind bars. It shows staff think visiting regulations should be made tougher. Half of them thought testing for cannabis, which is detectable for a month after smoking it, is encouraging people to move on to heroin use which is harder to find in urine samples."
