I didn't go out to town yesterday afternoon in the end - the weather was terrible and I couldn't face running my errand because of this.
However, my best friend got promoted yesterday, and I did meet him in Kingston yesterday evening for a few celebratory drinks at Stein's (highly recommended for top-notch German beers and food - not good for vegetarians, but then that serves them right for their lifestyle choice). The bus into town was seven minutes late, and the one returning three minutes late.
Then, this morning, I went into town with my family, also by bus. A four minute delay going in, an three minutes coming back. In all, that's 17 minutes and £42.50.