In an opinion piece for the Daily Mail, columnist Robert Hardman argues that London has become a "Tarnished Jewel" after a decade under Mayor Sadiq Khan, whom he characterises as presiding over "feckless rule". The piece contends that the capital, once regarded as a global showcase city, now shows visible signs of decline, with Hardman describing an atmosphere of "decay and disappointment" hanging over it.

The article forms part of the Mail's ongoing critical commentary on Khan's mayoralty, which by 2026 has run for roughly ten years. The full text of Hardman's detailed case was not available beyond the headline framing, but the piece sits alongside other Mail content questioning London's governance and civic condition under the current administration.