The fire which engulfed Grenfell Tower in London’s North Kensington on 14 June, 2017, with a death toll of 72, is still under investigation. The dead were largely recent immigrants to the UK. The tragedy, it’s clear now, was caused by an unholy mixture of neglect, racism, greed and corruption. There’s been much shameful denial and buck-passing, and the issues around the building’s shockingly inadequate cladding haven’t led to much action elsewhere.

In the centre of a Venn diagram linking climate change to the mystic landscape of Dartmoor and the West Country, sits this tightly conceived show about "green" witchcraft in contemporary art. Witches were once very common in this part of the world; the last witch to be executed in Britain was from Exeter. The local museum has invited a selection of artists to contemplate this local history and the result has brought the dark arts into the light of a 21st-century space for art.

Chinese artist, Ai Weiwei has created an extremely beautiful installation at the Design Museum in which the disparate elements play their part in creating a powerful overall message. On one level the exhibition is about design, but it also invites you to consider far more serious issues than are normally addressed in this temple to consumerism.

When Berthe Morisot organised the first Impressionist exhibition in 1874, along with Monet, Degas, Renoir and co, she’d already exhibited at the Paris Salon for a decade – since she was 23. That’s not bad for someone refused entry to art school because she was a woman!

What a feast! Congratulations are due to the National Gallery for its latest blockbuster After Impressionism: Inventing Modern Art. Such a superb collection of modern masters is unlikely to be assembled again under one roof, so this is a once-in-a-lifetime, must-see exhibition.

A small cottage vanishes into a surrounding bay, its walls apparitional against pale waters. In the background, a pier juts out into the ocean, equidistant to sea-green hills and a brown strip of land. The tide gently meets the shoreline, white on blue-grey wash. All is quiet, all is still, as nature slowly erodes every last trace of man.

Despite the fact that it’s a cruel depiction of an aging woman, I have always loved Quinten Massys’ The Ugly Duchess (pictured below, left). The Flemish artist invites us to laugh at an old dear who, in the hope of attracting a suitor, has tucked her hair into a horned headdress and decked herself in a décolleté gown that exposes her wrinkled cleavage.

Entry to Mike Nelson’s Hayward Gallery exhibition is through what feels like the store room of a reclamation yard. Row upon row of Dexion shelving is piled high with salvaged building materials including old doors, ancient floorboards and wrought iron gates, while even more gates and doors are leant against the walls.

It’s 1986, and a young Sonia Boyce (main picture) speaks to poet and sculptor, Pitika Ntuli, about the "perpetual struggle to be heard and appreciated" as a Black woman who is an artist. "I’m here, you can’t wish me away," she responds with characteristic verve and fight.

I once gave Peter Doig a tutorial, when he was a student at Chelsea College of Art. He had little to say about his strange images and I came away feeling I’d seen something unique, but was unable to tell if he was a very good painter or a very bad one.