By Charlie Conchie Fast fashion giant Shein has admitted it found two cases of child labour in its supply chain last year in a revelation that will likely fuel concerns in the City ahead of potential blockbuster float on the London Stock Exchange. In a report published yesterday, the China-founded retailer said it had stepped up its auditing of suppliers through 2023 and uncovered two instances of children under 16 being put to work in the manufacturing of its low-cost clothing. However, while the firm suspended orders from the suppliers and said the cases were “resolved swiftly”, it is still …