China-based retailer swung to $99m loss in first quarter and faces scrutiny over its environmental footprint

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Shein, which built a fast-fashion empire on what seemed like impossibly low prices, has been forced to lower its own valuation in a cut-price stock market float, after falling into the red earlier this year.

The online retailer will list on the Hong Kong stock exchange on 1 September at a valuation of close to $27bn (£19.8bn), significantly down from a near-$100bn private market peak four years ago.

Brent crude rises above $90 a barrel for the first time since 30 July after US president tells Tehran to surrender

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Oil prices have risen again after the two-month window to negotiate a peace deal in the US-Israel war on Iran expired on Monday with no end to the conflict in sight.

Iran said on Monday that it would take a more aggressive stance if talks with the US failed, while Donald Trump demanded Tehran “put up the white flag of surrender” in an interview with Fox News.