COVID-19: support for businesses

COVID-19: what is the support available for businesses?
The Chancellor, Rishi Sunak, has announced measures to support businesses. This include the coronavirus job retention scheme, the self-employment income support scheme, VAT and self-assessment payments deferrals, statutory sick pay help, grants and loans:

https://www.gov.uk/government/publications/guidance-to-employers-and-businesses-about-covid-19/covid-19-support-for-businesses