This is a nice article on TES about the longest hours of teaching, the mis-perception of the long holidays and the reason why it is the profession with the highest levels of drop off during the first 5 years.
http://www.tes.co.uk/article.aspx?storycode=6318817
Short summary...
The longest hours
Average number of hours worked per week:
1. Production managers and directors of mining and energy firms 49.6
2. Teachers 48.3
3. Advertising and PR directors 42.2
4. Financial institution managers and directors 40.9
5. IT engineers 39.0
6. Chief executive officers and solicitors 38.5
7. Medical practitioners 38.4
8. HR managers and directors 38.0
9. Barristers and judges 36.0
10. Accountants 35.6
Source: TES, 2012.
