I was tootling along to Banqueting House today (it was closed) to see the Rubens ceiling when I dived off the Piccadilly Line and nipped into Covent Garden to see the balloons.

Aren’t they magnificent.

100,000 white balloons installed by the artist Charles Pétillon to form a giant cloud.

There were eerily magical and made me catch my breath when I first saw them.

And then I stared, for ages, in awe.