During my 31 years working in the London area I averaged about 180 days work per year. By juggling leave and public holidays and rostered days off one could achieve over a dozen fortnights off per year. Also, by taking no leave during summer and thanks to the flexibility of my colleagues I was several times able to be away from work for 6 weeks for overseas holidays.
The work can be intense but there are adequate mandatory breaks to relax. On a typical morning duty from 7am-2pm one would expect to work for around 3-4 hours. Less when things are quiet, more when it's busy.
I was always a "family" man so my time at home was very important and I had plenty of time with my wife and children. In no way would I ever have become "married" to the job. That's for fools!
After 31 years I retired at age 58 and live comfortably on a good pension.
Good luck for the future....