JJB Sports, which narrowly avoided administration this year, revealed that first-half losses had almost tripled after problems with stock took a heavy toll on sales and profit margins.

The sportswear retailer struggled to convince suppliers to keep trading with it after breaching its banking covenants last year. The lack of goods in stores saw sales fall 43 per cent to £178.6m. This translated into a rise in pre-tax losses from £14.8m to £42.9m.