We live by the Common now after having moved over from SE London last year. For the last decade, I’ve used this agency called Domestic Shine and have never been less than happy with the cleaners they’ve sent us. Joanna, the lovely Polish lady who runs this, is a genuinely sweet person. Some of her cleaners do not speak English (they’re mostly Polish), but that’s never been an issue as Joanna is very responsive on WhatsApp/SMS and translates what I need (my current cleaner speaks fluent English so I haven’t had to do this in a few years).
EDIT: Joanna’s mobile number - +44 7891 653122