Thanks so much for that!
It seems they have now announced a self-employment income support scheme - SEISS - I might be eligible as half my salary is PAYE and my dividends are split between myself and my wife. More importantly, it is a grant that doesn't need paying back and I can continue working.
My profits are also under the benchmark, but will check with my accountant if she thinks my last three year self-assessment returns will see me contacted by HMRC and paid 80 per cent accordingly.
The only grey area is I am an employee of my own company, so whether they would assess me as self-employed, I very much doubt.