This poor chap has been sacked for impersonating a 1970s PE Teacher.
Now you've always got to take what the papers say with a pinch of salt. Mostly they just copy stories from each other pretty much word for word.
Now although I'm always keen to condemn anyone who comes to work looking like a Gypo, I probably wouldn't moan if he is teaching PE from 9 till 10 then keeping his tracksuit on whilst he does an hour's Geography before heading back to the Rugby Pitch. (All PE teachers do Geography- it's the law)
On the other hand if it's one of these schools where the staff are a bunch of scruffs, then well done to the Head for demonstrating some leadership (now known as bullying), introducing a dress code and chucking out anyone who still looks like Wurzel.