It was a long day day yesterday in London, where I was on work-related business.
I needed to give myself plenty of time as well while in the capital, just in case things went on longer than expected.
The bottom line is that I did have a certain amount of free time, while waiting for my train home, plus travelling in the city itself from one place to another.
I was able to visit the tourist sites that I had wanted to. In addition, I managed a few more as well.