JOURNALIST ALERT!
I have grave suspicions about the authenticity of jalguy. However just to correct his journalistic-type pronouncements, BA have sacked two people this year, and one resigned. Only one of the three failed a zero tolerance blood alcohol test. At least get your facts right.
Now as for drugs, do you have any evidence whatsoever to indicate the presence of a drug problem amongst any UK pilots? Are there any other things you'd like to legislate against just in case they are a prpblem as well. What about an alertness test in case the crew are tired. How about a 'mood-o-meter' in case they've had a row at home which might distract them?
This whole thread smacks of the prudish, puritancial zeal which emanates from some parts of the USA. There are a whole lot of other initiatives which will make a far more significant contribution to aviation safety than expending vast resources on a tiny problem whose profile has been exaggerated by a sensationalist media.
By the way, I don't recall any senior person within BA stating they would introduce a random screening program. Perhaps you picked up a slip of the tongue by a junior spokesperson. Unless of course you can name the individual involved?