Hat tip blog "Nearly legal" (I had no idea of this requirement nor that a landlord cannot serve a section 21 eviction notice if they do not provide a copy to a tenant.
"MHCLG has published a new ‘How to Rent Guide’ today, 10 December 2020. As a reminder, for any post 1 October 2015 assured shorthold tenancy, or ‘renewal’ tenancy (where the guide as been updated), the tenant must be provider with the How to Rent Guide, and that must be the most recent version at the time of the tenancy start (or if served later, likely a later version would do), or the landlord cannot serve a section 21 notice. It has to be provided to the tenant in hard copy, unless the tenant has expressly agreed to a PDF version by email. Sending the tenant a link will not do.
Intriguingly, as well as including the electrical safety regulations, this version notes the forthcoming ending of section 21 but cautions section 21 is still valid in the meantime…"