No bluebirds over the white cliffs...somebody has been having is on!
Fine shots, Dave. Mojo comes and goes, that's something I've had to get used to over the years, not just in photography. But there is something else going on just now, and I've heard of many creative people who despite having extra time on their hands, just cannot get things happening at all. Writers, musicians, artists - we expect to be in a really creative situation now, reacting to the "new normal", but it is just sucking the energy out of us, the creative energy.
So, don't worry about your mojo, Dave. It'll come back fighting. In fact it is already beginning to. 4 + 5 are beautiful.