The index of Britain's biggest listed companies has since recovered and is now flat, as of 11am. The FTSE 350, meanwhile, is up by 0.1%, as traders process news of a 0.1% decrease in GDP in September.

Topps Tiles, the country's largest tile retailer, posted a 50% reduction in adjusted annual profits to £6.3m but reported that sales had returned to growth since the end of September. The share ...