It's not just you who works hard
If John Cattermole had ever met anyone other than teachers, he wouldn't be able to make statements such as "other professions... of course have no evening or weekend work". Has he never met a doctor, solicitor, university lecturer?
And his offer to give up some time in August to undertake research would be more attractive if his potential as a researcher were more convincing. For example, he writes that "someone once told me that (a flexible system for holiday-taking) exists for teachers in either Canada or Australia". Did the prospect of having an article published in The TES not merit a few clicks on the internet to locate the actual information?
Teachers may have a good case to make about workload issues. But if they want to be taken seriously by the community at large, and not just by other teachers, including people such as John Cattermole (and his isn't the first article I've read in this vein) they really do need to make an effort to be better informed in their arguments.
Mary Hayden 21 Eden Park Drive Batheaston, Bath