I decided to try out this agency. They sent a nice person who I was home enough to be able to train (where are keys, access to back garden, etc,) but after 3 months of rain, she has quit. Now I am at work all the time, and I thought (?foolishly) that the old one would show the new one the ropes on the last day.
Nope. And she's never seen a dishwasher or tumble dryer before.
This agency charges £10 an hour! I thought they would make it easier and so were worth it, but it looks like I was mistaken.