Even in London? It seemed that way when I worked in London for a few months. I realize it was a small sample size, but it seemed to be the case for 95% of my coworkers so I figured 65% on the whole is believable.
Approximately 20-25% of working age UK adults are not employed. Not unemployed, just not employed.
Many (most?) people want to get that stuff out of the way so that they can do what they actually want, like spend time with their families, hobbies, watching TV, learning etc.
This is probably what they mean by "more productive", not "more output per unit time at work". Just more efficient with their time, more organised, etc.
