NOTE: The law referred to in this post was replaced from 2 December 2020. The post is retained here for record purposes.
The Health Protection (Coronavirus, Restrictions) (England) (No.4) Regulations 2020 - (SI 2020/1200) - have been published - (32 pages pdf).
The Public Health (Control of Disease) Act 1984 is the legal basis for the Regulations.
The Regulations apply to England only and are imposed for reasons set out by the Prime Minister - Hansard 2 November 2020 . They were debated in, and approved by, the House of Commons on Wednesday 4 November - Hansard 4 November.
The Regulationscomprise 26 paragraphs (structured into 6 Parts) and a Schedule (with 3 Parts).
Extensive restrictions are placed on "Leaving Home" (Part 2), on "Gatherings" (Part 3), and many businesses are again required to close or are restricted (Part 4 and the Schedule).
Enforcement (Part 5) includes a fixed penalty regime. In some instances a fixed penalty can be as high as £10,000.
The Regulations replace the 3 tier system introduced in England from 14 October and the Regulations imposing those tiers are almost entirely revoked.
The Regulations expire at the end of the period of 28 days beginning with the day on which they come into force.
Significantly, schools and universities remain open.
UK Government - New national restrictions from 5 November.