Eating the fuel

It's 2.25am here in the UK and I've just got in from a job I had to do at short notice. I ended up having to drive 114.8 miles this evening to a club and back as part of my work. That's a third of the tank already gone, and I already shoved £45 in today :/ Not good. Oh well, I am exhausted, and I need to be up early to, surprise surprise, do some more driving....