It is essential that you always make sure that you provide the tenants with the most up to date version of the 'How to rent in England' guide whenever you start a new tenancy or provide a new fixed term.
Gov. are supposed to update their site to let people know when a new version is released or amendments have been made but recently this has not been done.
The best advice is to make sure that you don't rely on using a saved or photocopied version, but to download a fresh one each time.
Go to https://www.gov.uk/government/publications/how-to-rent for the most up to date version.
For archived copies go to https://nearlylegal.co.uk/how-to-rent-archive/