When I was sent to an adult high security prison aged 14 all the normal colour, shapes and movement that I saw around me each and every day as a child disappeared. It wasn’t there. Prison does that; it’s all straight lines, hard on the eye, hard to the touch. There are square walls or oblongs but there are no triangles, no interesting shapes. It was a harsh environment and I was a child, the softness of that child taking all of that in.

Annual lists of the richest, the most powerful, the movers and shakers, have an awful fascination: like gossip, we like to look and comment while feeling slightly morally compromised. But they also have a function as a snapshot of where we are at. This time it’s the turn of the art world’s most influential figures, as chosen by the magazine ArtReview, which each year creates a talking point for itself replete with embargoes and PR. 

In July we launched a competition in association with The Hospital Club to unearth talented young critics. We were clear about what we were looking for: “We want to read reviews that make us think – provocative, entertaining writing that gets under the skin of the art it addresses, that dares to ask uncomfortable questions and offer new answers. We’re looking for a review we wish we’d written ourselves. Surprise us, shock us, enrage us.”

Art, design and craft is such a broad category that it is no surprise – even less a criticism – that most of the nominees comfortably inhabit just one of these areas of endeavour.

Sue Steward, who died suddenly last week from a brain haemorrhage, was one of theartsdesk’s most loved members, her free spirit and her double specialism in world music and photography making her an intrinsic asset to this pioneering critics’ site in 2009. Her unfussy eye for colour and composition also influenced the early design of The Arts Desk and traces remain today.

The Arts Desk is delighted to announce a new partnership with The Hospital Club in Covent Garden. There are plenty of private members club in central London, but The Hospital Club is uniquely a creative hub with its own television studio, gallery and performance space, which for certain events are open to non-members.

Michelangelo's Taddei tondo, which depicts the Madonna and Child with the Infant St John in a rocky landscape, is the only Michelangelo marble in Britain. Currently one of the stars of the National Gallery's Michelangelo & Sebastiano show, it is also one of the greatest treasures of the Royal Academy's permanent collection, and is the subject of my new book.

They are hardly the ideal conditions in which to create. Danger is a constant and lurking menace, and it comes in multiple guises. Industrial injury is the main threat, as is the constant risk of arrest. Other hazards include deafness, breathing polluted air and public discontent. The tools and materials used in this form of installation - power drill, tarmac and steamroller - are expensive. And the work cannot be sold. But despite these powerful deterrents, a clandestine group of vagabond practitioners will stop at nothing to get their work into the public sphere.

I have always felt very lucky to have been working as an artist in London during the period when it transformed into the capital of the art world. It has been a beautiful, fascinating and profitable ride. When I started art school in 1978, contemporary art in Britain seemed like a cottage industry situated in some little backwater seldom visited by the public or the media.

Un Voyage Á Travers Dans Le Paysage Électronique Français, the French subtitle, goes further. French Touch is the first exhibition to celebrate and dig into France’s electronic music heritage: exploring the lineage which laid the ground for the world-wide success of Daft Punk.