I had a torch within reach but couldn't be bothered to use it. There was sufficient sky glow for me to be able to manage and I can do toilet in total darkness.
The last thing I read on Twitter before the lights went out was from a chap in Wembley whose power was out.
I knew our outage affected only a limited area as David had gone to Pets At Home and The Gym around a kilometre hence, neither of which would have functioned without power. He would have returned sooner if they had been out of action.