There’s a sharp observation, delivered in Alan Bennett’s soft tones, that sums up the reputation of the painter Eric Ravilious: “Because his paintings are so accessible, I don’t think he’s thought to be a great artist. It’s because of his charm. He’s so easy to like and things have to be hard, if they’re not hard, then they’re not great."

The story is riveting. A nanny living in New York and Chicago spent her spare time wandering the streets taking photographs. She learned to develop and print, but her plan to publish the images as postcards fell through and, as time passed, she stopped bothering even to develop the negatives let alone print them.

Part two of The Milk of Dreams, the central International Exhibition at the 2022 Venice Biennale, housed in the Arsenale shipyard, starts with the kind of massive, grandstanding gesture that’s necessary in a venue of this scale: a colossal bronze bust of a Black woman by American artist Simone Leigh. The serene head with its eyes smoothed into blank sightlessness extends up into the ancient rafters, while the upper body is reduced to a ribbed dome-like form reminiscent of traditional African architecture.

Air is a weighty subject, and in both senses; if we did not contain its gases in our bodies, the air would crush us. Ninety-nine per cent of the world’s population breathe polluted air daily. There was a time on this planet, 3.5 billion years ago, before oxygen. Startling facts like these are perhaps to be expected from an exhibition at the scientific Wellcome Collection.

If you need an excuse to spend a day in the charming seaside town of Whitstable, the Biennale is it. After a four-year hiatus, the festival is back with a somewhat edgy, apocalyptic feel.

Cecelia Alemani's vision for The Milk of Dreams, the International Exhibition at the Venice Biennale 2022 had me excited – and perplexed – from the moment I heard about it.

Cornelia Parker’s early installations are as fresh and as thought provoking as when they were made. Her Tate Britain retrospective opens with Thirty Pieces of Silver (pictured below left: Detail). It’s more than 30 years since she ran over a collection of silver plate with a steamroller, then suspended the flattened objects on strings so they hang in silver pools a few inches above the floor.

Who was Walter Sickert and what made him tick? The best way to address the question is to make a beeline for the final room of his Tate Britain retrospective. It’s hung with an impressive array of his last and most colourful paintings.

Ming Smith is a Black female photographer. When she first dropped off her portfolio at New York’s Museum of Modern Art in 1978 the receptionist assumed she was a courier. When MoMA offered to buy her work she declined at first because the fee didn’t cover her bills. Luckily for us, she relented. Later she said that, "Being the first Black woman photographer to have a work acquired by the MoMA was like getting an Academy Award and no one knowing about it."

I’m a sucker for traditional vitrines and the procession of old style display cases installed by Ali Cherri in the Renaissance galleries of the Sainsbury Wing look very handsome.