From the pavement, Halden & Crewe looks exactly as a London tailor is supposed to look: a narrow shopfront, a single headless mannequin in chalk-stripe flannel, a brass bell that greets each customer with a note of mild disapproval. Inside, however, something has shifted. The cutting room at the back, once the preserve of men who had served forty-year apprenticeships, is now run by Desmond Achebe-Wright, who is thirty-six, softly spoken and quietly dismantling the house style.

Achebe-Wright arrived as an apprentice at nineteen, having written a letter so persistent that the head cutter of the day agreed to meet him simply to make it stop. He spent five years learning to baste, press and chalk before he was allowed near a customer. When the old guard retired, the partners offered him the shears on one condition: the house had to remain recognisable. His interpretation of that condition has been generous.

The changes are subtle to an outsider and seismic to a tailor. The shoulder, once built up with layers of canvas and wadding, is now soft and gently sloping. The chest is cut with more room, the trouser rise is higher, and jackets are shorter and lighter, often only half-lined. The effect is a suit that moves, sits and folds like a well-worn cardigan while still looking unmistakably tailored.

A suit for people who never wanted one

The customers have followed. Where the order book was once dominated by bankers and barristers, it now includes architects, chefs, a surprising number of musicians and several women who had been politely turned away elsewhere on the grounds that the house did not cut for them. Achebe-Wright cuts for anyone who asks, and his waiting list now stretches to fourteen months. A two-piece begins at the price of a modest used car.

A suit should not make you stand up straighter. It should make you forget you are wearing it. — Desmond Achebe-Wright

He is sceptical of the word bespoke, which he feels has been diluted by shops offering little more than a tape measure and a book of swatches. A genuine Halden & Crewe commission involves a paper pattern cut by hand for each client, at least three fittings and roughly sixty hours of work by four people. The pattern is then kept in the basement archive, alongside those of customers who have been dead for more than a century.

That archive is, in its way, the point. Achebe-Wright spends Sunday afternoons going through it, looking for forgotten details: a ticket pocket angled for a railway timetable, a sleeve button that once let a surgeon roll back his cuffs. Several have found their way into his new work. He sees himself less as a revolutionary than as someone dusting off an instruction manual the trade forgot it owned.

The partners seem delighted. Revenue has grown for four consecutive years, and the average age of a new client has fallen by almost two decades. The brass bell still rings with the same disapproving note. It simply rings more often now, and for a much wider cast of people, which may be the most traditional thing a tailor can hope for.