I wish we had a government that had the balls to give advice, with caution, to all those who had attended the protests. Just get ahead of the game on this. People were always going to go, so be proactive! A statement aimed at all attending maybe:
"We advise everyone follows the rules. Social-distance and stay at home where possible. This is the best way to keep the spread of this virus down. If at any point you feel you may have done anything that directly contravened these rules, please be as cautious as possible. If you are around others, and we still strongly advise you are not, please wear a mask. While we don't condone this, if it happens, this will save lives of many, many people. We can't stress this enough. Cover your face.
Please avoid others where possible too, and if you have been out and fear you may have come into close contact with other people, consider avoiding other public places such as shops or public transport on your way back. Limit the spread. Maybe keep your distance from people for some time after this event too. Isolate where possible, and don't see loved ones. Minimise the risk. Don't touch any handles or lift buttons as you return home, or make an effort to clean them. Please, please act responsibly and considerately"
That isn't perfect, but it took me two mins to write. Hopefully you know what I mean though. I can imagine their behavioural scientists could come up with something better. Maybe get in touch with activists and spread this message too! Once again, get ahead of the game. Get in touch with John Boyega! Ask if he could issue a statement about it. Ask him to wear masks, keep distance, avoid shops on the way back, avoid public transport. Be ultra cautious etc. Damage limitation.
I wish we had this common sense. You don't have to specifically mention the protests or condone them, but you can explicitly imply it. Maybe i'm being naive, but I wish we could do this kinda thing.