If this was a rex pilot then it is company policy to be in full uniform. The way things are still going at rex (still short of crews), is he was already late to crew a flight and would need to go straight out to the aircraft to operate it. Trust me if people at rex didnt have to wear the **** uniforms & hats they wouldn't but cases in the past for not wearing everything as stated in the PPM gets you soc'd (subject to operational clearance), with a tea & biscuits meating. The management are anal about it down to wing pins.