Some places have euro-profile locks with thumb turns for the inside. I think in some English rental properties these are compulsory. (Or Yale latches). https:

Some places have euro-profile locks with thumb turns for the inside. I think in some English rental properties these are compulsory. (Or Yale latches). https://www.wickes.co.uk/Yale-P-ET3535-SNP-Euro-Profile-Thumb-Turn-Cylinder-Lock---Nickel-35-x-10-x-35mm/p/109882 https://www.wickes.co.uk/Yale-P-ET3535-SNP-Euro-Profile-Thum...