Please, do not give instructions for your dogs to go to the RSPCA. Despite their much advertising, they are not committed to keeping your dogs alive. The Dogs Trust are a different story.
I am a breeder, live along and I have 6 dogs. The same concern has crossed my mind.
First I would contact the breeder of each of your dogs. If you've signed a contract then that's the person you should contact, for, god forbid, the worst happens. Just discuss and form a plan with them. That's what I'd expect of my pup owners, and some have already been in touch

. But, for the short term, should you become ill with the virus and need to be hospitalised, you still need to have a plan. I would be looking towards local friends or neighbours that you trust, totally trust. Discuss with them. Once you have a person/persons in place, inform them of where details about food, feeding etc will be kept (I have instructions on my fridge!), you also need to write down a briefing of each dog, dos and don'ts. And, of course, they need to know where a key will be kept.
Planning ahead results in an easy mind. It's been a bit mammoth for me but, I have short term, and long term, plans in place. I am not going to be ill 'cause it's too difficult to be so, but, should I succumb to this hideous virus I am happy that my dogs are going to be looked after, and to my wishes. Stay safe and stay well.