if stuck in traffic 19 is the channel to use but around big citys (brum,leeds,manchester,cardiff) you do get prats that sit on 19 at home with there burners whacked up to the max and sit there all day abusing truck drivers.
my favorite is scab in a cab.
but most companys use diffrent channels for there own drivers(post office 24) and night running on the m6 is channel 16 and i think32)
jon