.... FYI, I have been practicing 'isolation' since the day it was government advised. I food shop only once a week atm rather than daily and Waitrose is only a 7 minute walk along the river and so minimal contact with people. And so I am minimising risks to both myself and others.
I do not consider that spending time outdoors with a camera in wilderness areas (including deserted beaches) within walking distance is either selfish or irresponsible.
Stay Safe - No-one is guaranteed tomorrow whatever you do or don't do.
P.S. - I wouldn't expect you to be "bothered if your [my] selfish actions cause your own demise"