It's good to leave house cleaning to the pros. There are many legally registered maids and even more cleaning companies. I prefer cleaning companies because they offer more services. I had a contract with a company like this and they did wonders for me. I have to mention they were legally registered. And since I've worked with them they evolved so much. I'll leave it here if anyone is interested in contacting them
crowncleaners.org.uk. But if most people prefer a maid that's ok too. There are pros and cons to this and one con would be that the maid should live with you most of the time, while with cleaning companies it's different, you both negotiate a program.