Minimise your expenses and outgoings. Keep your heads down, hope for the best, but put your self in the best position you can if the worst happens. Care homes and other essential services will be crying out for temporary staff - get your name down with an agency.
If you can, put any equipment and supplies into someone elses name. Distance any personal and business assets away from the ownership of the business. That includes website URL's and email addresses.
Hopefully not too many people have got their homes attatched to the business.
Give things a couple of weeks, both to see if trade bounces back and to see exactly what help you can get from the Govt.
Remeber that what help the govt. is currently offering is in the form of loans that need to be paid back. The loans are interest free at the moment - check the small print to see if that will continue for the life of the loan.
Do you want to be borrowing money to pay staff that may conceivably decide to leave soon after the crisis is over? You may like your staff, but when things go wrong they won't care about you.
Unless your home is attatched to the business never be afraid of insolvency. Don't hold out for too long. If your equipment is not owned by the business then it might be better to walk away and start again in someone elses name. Write off some debt, tax and vat. The money is far more use to you than to the taxman or the bank.
Unless you owe them rent most landlords are surprisingly amenable to leases being assigned to a new venture. It is better than losing a tenant.