Revealed: auditors raised minimum-wage red flags at Boohoo factories

Exclusive: Third-party reports set out allegations at 18 Leicester suppliers

• How Leicester's factories went to war with Boohoo

The fast-fashion retailer Boohoo has been selling clothes made by at least 18 factories in Leicester that audits say have failed to prove they pay the minimum wage to workers, a Guardian investigation has found.

Third-party audit reports produced over the past four years make claims of critical" issues over record-keeping and working hours at the time they were written, suggesting that in parts of the supply chain workers may be paid as little as 3-4 an hour.