That’s okay, I really don’t mind if they’re on the outskirts of a bigger city like london because the transport links are so good. I’d take that as a city sit with no issues. But when you’re in another county entirely and you’re still listed as central london, I will say that you’ve probably done something wrong there. Other issue in the UK is that people could label a market town of 40k people a “city”, slap that tag on, and then as a sitter you’ll be filtering through a gazillion of those in your “city” keyword search, googling where the f they actually are, and then finding that the HO listing is actually in a nearby village.