The own nothing aspect is possible because of the perfectly legal confiscation provisions of the Civil Contingencies Act 2004 -
https://www.legislation.gov.uk/ukpga/2004/36/contents
Under its emergency powers (
https://www.legislation.gov.uk/ukpga/2004/36/part/2) can be found:-
(b)provide for or enable the requisition or confiscation of property (with or without compensation);
(c)provide for or enable the destruction of property, animal life or plant life (with or without compensation);
(d)prohibit, or enable the prohibition of, movement to or from a specified place;
(e)require, or enable the requirement of, movement to or from a specified place;
(f)prohibit, or enable the prohibition of, assemblies of specified kinds, at specified places or at specified times;
(g)prohibit, or enable the prohibition of, travel at specified times;
(h)prohibit, or enable the prohibition of, other specified activities;
(i)create an offence of—
(i)failing to comply with a provision of the regulations;
(ii)failing to comply with a direction or order given or made under the regulations;
(iii)obstructing a person in the performance of a function under or by virtue of the regulations;