If l was PM,
Once Italy was hit, (end of Jan)
Reconvene the commitee responsible for Pandemic planning, stock up PPE/hospital supplies in epic quantities in warehouses close to every major hospital.
Set up a commitee of senior consultants, Hospital trusts managers, nurses and cleaning staff and planned what would be required and sourced it FAST. With their input rearranged hospitals to allow for offsite testing (carparks) splitting covid and non covid patients into either different hospitals or different sites on hospitals.
Taken over a hotel close to each hospital to allow enough staff to move in for the duration.
Set up a fund and help service to help essential hospital staff to prepare for Pandemic impact on their families.
Then....
Give all a week to return to Uk before closing borders, all returnees to have 2 week quarantine strictly enforced and supervised.
Total border shutdown, ferries,flights,eurotunnel to people.
Essential supplies coming in managed by army, and quarantined and disinfected.
For emergency travellers, diplomatic etc 2 week quarantine after coming in on special flights only.
If this had been in place by the 2nd week of Feb things may have been different..
We could have,
Track and trace the far fewer cases, children stay at school, most industries to continue as normal, jobs as normal, army to manage essential goods incoming.
Ruthless sticking to the closed borders.
as you can tell l have had far too much time thinking about this......!!