Actually , there was a well-publicised case a couple of years back when an aggrieved motorist , who himself had received a speeding fine not so long before , followed a 'safety camera partnership' van up the A77 , through roadworks with a posted limit of 50mph , at an indicated speed of 85mph , witnessed and corroborated by his passenger , and , on following said van all the way into the road policing unit at Govan , made a formal complaint to a senior officer .
Far from making any kind of trouble for the complaining motorist , the complaint was taken seriously , the motorist's car was taken for a run to check the accuracy of his speedo , and confirm the actual speed at his indicated 85 , and on the strength of his , and his passenger's statements , the van driver was both disciplined and prosecuted !
Another time , a friend of mine was pulled over for a faulty tail light , and about to receive a ticket , when he noticed the police car also had a sidelight out - on pointing this out to the officer , he was told 'point taken' , and sent on his way