While Michelin keeps its staff numbers secret, industry insiders say the guide cannot keep up with the thousands of restaurants in the guide

How many inspectors does it take to review the country’s best restaurants – a pinch, a baker’s dozen? For more than a century the answer has been kept secret by the world’s authority on good food: the Michelin Guide.

But the French tyre company’s famous hotel and restaurant reference book has been challenged by chefs, restaurant critics and diners, who question whether the guide has enough of its anonymous inspectors to adequately review and monitor the eateries that are included each year.

A growing number of people are rediscovering their love of plastic bricks in later life and boosting the Danish company’s bottom line

In a cosy cafe in Kingston upon Thames on the outskirts of London, nine people gather in the early evening to drink and talk. To the casual observer it may look like a book club, but when the friends reach into their bags it’s not paperbacks they produce – but packs of Lego.

Geoff Lay, who organised the gathering, worked in software development before recently starting Noble Brick, a Lego-focused events organisation.