'Larger shared houses (with three or more floors and with five or more tenants) now have to meet minimum standards on things such as toilets and basins. Landlords have to apply to the local authority for a licence or risk a fine of up to £20,000. And tenants get extra rights. The new laws came into effect in April and were set to be fully enforceable in July.'
These rules also apply in Scotland to HMOs.

I've known SO many people screwed over by landlords and agents that none of the students I know pay's their last month's rent, as they know they'll never see their deposit back again.
The German students are all completely gobsmacked at how few rights tenants have here.