An interesting read on how the UK government will likely respond, should escalation occur and a pandemic be declared.
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/213717/dh_131040.pdf

The sections below in particular spell it out very clearly.
(probably not a good time to be a pensioner or have existing medical conditions - Rationing is brutal!)
6.32 - 6.34
7.26