Well, yes, and outside of 22 hours teaching and however much planning and marking that entails (which varies for all the reasons up thread), there's also: whole school meetings, dept meetings, pastoral briefings, positive phone calls home, negative phone calls home, report writing or data drops x (up to) 7 Yr groups x 6 times a year, detention supervision, chasing up detention non-attendees, extra reports/feedback for SEND students, safeguarding referrals, recording behaviour incidents on mgmt system, 2.5 hours registration activities a week, running after school clubs, running lunchtime clubs, photocopying, writing praise postcards, finance admin/admin for orders, trip admin (it can take a a week's worth of hours just to put together one trip - but spread over several weeks, obviously), subject CPD, pedagogy CPD, safeguarding training, Prevent training, medical training. That list is obviously not exhaustive.
So you can see how 24.5 hrs in the classroom (22 teaching plus 2.5 tutor time) can easily become 55-60 total! That's without being a Head of Dept or Year group (who can lose just a few hours teaching time to pick up hours extra work).