I have a work associate , he boasts to anyone unfortunate enough to be in earshot that he has "been in since 7am" but another work colleague gets in at 8, and can see that he hasnt actually started any work by then and generally is looking at (non work) stuff on the computer, having a coffee and chatting until at least 9
I must have worked with his brother! We had flexitime. I tended to start late-ish (9.30 or so) so I had time to give the dog a good long walk before work. X always "started work" early, 8-ish. He used to take the piss out of me for starting "so late it's nearly lunchtime".
During a particularly busy spell where I was covering for 2 other people as well as doing my own job, I started coming in at 8 for a while. X would get in at 8, but he'd make a coffee, swan around the building have a chat with every fucking person working there as they drifted in, before finally rocking up and holding court in the communal kitchen around 10. He didn't do a fucking stroke of work before 10.30!
During the rest of the day, he would often pop out on errands, which were easily disguised as the organisation was split across several sites in the same small town. He'd "Pop up to the print room" and come back having clearly had a haircut, or "Take some papers over to the court", said papers looking mysteriously like library books or a bag of veg from the greengrocers. And he'd do a similar tour of the building before leaving on the dot of 4pm.
When he took early retirement + redundancy, and his "workload" was distributed among 3 of us, we didn't even notice the extra. And he was only retired 18 months before his marriage broke up, we reckon his wife couldn't bear having the lazy fucker at home.