He wrote: “Lost a bit of waistline, still a long way to go 🙂 #skinnybeast #doubletwoshirts.”
Viewers recently gushed over Mark’s appearance, as people commented about his youthful looks.
“You built a time capsule in lockdown? Look a lot younger here,” a social media user quipped.
Another person remarked: “You look great, what’s your secret?”
“Looking fantastic,” a third person gushed, while another added: “You look amazing.”
The Chase airs weekdays on ITV at 5pm.