I'm not one of the eco-nutters who like the lockdown because it's reduced pollution.
Empty London is a deeply sad place at the moment, and I'm longing for the people and the traffic to return. All the same, though, it's hard not to notice the pristine blueness of the air. That was particularly the case yesterday, when a rare spring day of intense sunlight combined with the aircraft-free air to produce varying shades of blue that I've never seen in my 48 years in London.
I'd gladly swap it for polluted air and normality but, just for a day, it was a sight of astonishing beauty.