"In the part of rural Ireland[that I live in]there are no trains ,no night buses,and in lots of places, no buses at all"

Captain, in the part of New Hampshire I live in there are no local buses, the express to Boston stops by only in the morning & returns only in the afternoon, nothing after 6:00 anywhere. There's no public transport & we have 1 taxi & she quits at 4:30-5:00 pm. After that you walk, hitchhike (not if the police catch you) or drive/ride. There's no one in my town or even near by that goes to sessions so I drive. I don't drink, easy as that, it's still worth going out to a session though, 2 or 3 times a week if possible. I'd enjoy some sessions even more if a few others would cut down on their drink, some of them are real pains in the asses after they've had a few but there are always a few, the drink only makes them worst.

As for failing tests, in the far distant past I failed testing twice when I did nothing. I believe my asthma medsmay have set them off but I really never found out for sure. I was told that there are many things; spices, sauces & other common digestables can cause an incorrect readin but the blood tests are much more reliable.
If I failed a test now I would request a blood test right afterwards

Barry