Indeed, it would be useful. My friend's brother lives in Osbaston, just six miles from there, and we usually visit on Boxing Day while I'm staying with her for Christmas. I volunteered to drive, but realised I would have to charge while in Osbaston. My plan was to drop friend and husband off, go to that garage while they went for a walk or drank sherry or something, charge up to over 80%, then go back for the meal and party games, letting the car get to 100% on the granny charger during that time.
It's quite a tight schedule, so info on how busy it seems to be (at noon on Boxing Day!) and how fast it can charge would be handy.