I reported on the extended stay to 20 September 2020 for possession proceedings and enforcement at https://www.breakinglaw.co.uk Further covid-19 laws on the notice period to be given to tenants (before possession proceedings can be brought against them) came into force yesterday Saturday 29 August 2020.
The new laws will last until 31 March 2021. For any notice given to a tenant from yesterday and up to 31 March 2021, the period is doubled from what was the temporary three months to six months. There is a mighty exception. Where the landlord is relying on non-payment of rent and the arrears are for at least six months' worth of rent, the notice period is temporarily shortened to four weeks. There are other exceptions in relation to possession on the ground of anti-social behaviour and in respect of introductory and demoted tenancies.
For chapter and verse, see the Coronavirus Act 2020 (Residential Tenancies: Protection from Eviction) (Amendment) (England) Regulations 2020 (SI 2020/914).