David Cantrell ) gurgled happily, sounding much like
they were saying :

A big bloke, used to a few beers, would be far more competent whilst
over the limit than somebody smaller and unused to alcohol who may be
way under it.

I'm a big bloke. I'm used to a few beers. I am not at all competent
to drive when over the limit. Not at all competent. Therefore I can
not be more competent than anyone else.

In fact I am not at all competent to drive when I've had a couple of
beers and am still *under* the limit.

How do you *know* when you're under/over the limit? I don't have a clue
where the limit is - because I've never in my life blown into a
breathtester.