The fourth emergency service...?

I thought I'd forgotten to take a photo today, then remembered that I'd snapped this van on my way to work, while I was on the phone to my Mum. It's not the best shot, but I was glad not to have to try and think of anything else to photograph this evening. My brain feels empty of inspiration!

This is not my cup of tea (groan), but I know a lot of people who take their caffeine intake very seriously....