A traffic cop who once warned speeding drivers "this is not Silverstone" has been sacked after clocking up 154mph in a police car while on duty.<br /><br />PC Adam Smith was dismissed by North Yorkshire Police after a misconduct hearing found him guilty of gross misconduct.<br /><br />Smith - who was filmed in a force publicity video aimed at cracking down on 'street racing' in Selby - was clocked doing 154mph and 98mph on the same journey.<br /><br />The hearing was told both incidents happened on the A1(M) northbound and that there was no police purpose for the excessive speed.<br /><br />He admitted his behaviour breached the standard of professional behaviour and amounted to Gross Misconduct, a report of the hearing said.<br /><br />Smith was sacked with immediate effect and placed on the college of policing barred list.
