They do travel alone these days, not motorway cops but when I was pulled in Wales for crossing double white lines (yawn), he was on his own.
He was lucky that day, he got the guy that followed me as well in the overtake of a slow lorry that we had all been stuck behind for around 25 miles.
Massive open road and no danger, he was looking for bikers doing it apparently but our money was good enough too!
There is so little discretion used these days, they try to maximise their income.