Hello. I smoked cannabis, not much just a few drags, a few weeks ago. I had to have a urine drugs test today. I have never been a regular cannabis smoker and probably hadn t had any for about two years before the most recent occasion. I am slightly overweight and don t do much exercise. I do drink lots of water though. I told the man that lots of kids were smoking cannabis next to me on the bus the other day as an excuse, just in case. He said passive smoking won t affect me. What I want to know is... Will I pass the test okay and, if not, will I have grounds to contest the decision on the basis of my passive smoking claim if I only have a little bit in my system? Many thanks in advance.