All these folk who couldn't ride 10 miles without a shower. Some of us don't have this option. About 2 to 3 times a week, I have a 10 mile commute into the office, then a 6 mile commute to a site, then 6 back then another 10 home. No showers or changing rooms. Lucky if I get a disabled loo, but its mainly a loo cubicle. Baby wipes and a bottle of Sure 48 hour is all I have.
I feel lucky with that, at least I can get changed in my office a fair amount of time. Getting changed in a loo cubicle isn't pleasant. Oh and my employer has about 4000 employees in Manchester. I know of a couple of showers, between hundreds of cyclists. We all seem to manage.