House sharing

I think if you have a lodger they don’t have many or any rights.
You will need to check up on this because I’m no expert.

Can you take in a lodger/lodgers? They have fewer rights than formal tenants and can be evicted more easily. The government's "rent a room" scheme allows you to earn up to £7,500 without paying tax.
www.gov.uk/rent-room-in-your-home/the-rent-a-room-scheme

You need to think through what sort of house rules you would want. Access to kitchen/bathroom etc? Whether access to the living room is included? Are they allowed to have visitors? Relatives/friends/partners sleeping over?

choughdancer I think this is what you want homeshareuk.org/. Carefully vetted young people provide company and a bit of help in return for a lower rent.

Bumping this thread I hope you get sound advice. Just be careful of bad renters who might get tenant rights and then stop paying. Someone I know has a condo they rented to a couple. That couple hasn't paid rent in six years and our acquaintance can't get rid of them. He even has to pay their utilities.