British online retailer ASOS said its new warehouse in Atlanta struggled to cope with demand in its second quarter, resulting in a dip in US sales.

The US dip added to the company's challenges in the French and German markets. 

ASOS reported total retail sales up 11% in constant currency to £641.3m in the quarter to February 28.

It said it was confident growth would strengthen in the second half, putting it on track to meet its full-year guidance.