Re. Staying home from work rules

Hi,

I have a disabled son who is at high risk of serious complications if he contracts Covid, my wife also. Both received letters to shield.
I am my son’s main carer.

I am so very worried about returning to work, because of this, are there any such rules regarding living with vunerable family members, that will allow me to stay home from work ( without pay) & my job kept open?
I know the vaccine roll out commences soon but my wife & son are 6th on the list to be vaccinated.

Thank you so much

https://www.carersuk.org/help-and-advice/coronavirus-covid-19/working-and-caring

https://www.carersuk.org/help-and-advice/work-and-career

https://www.carersuk.org/help-and-advice/work-and-career/other-rights-at-work