The EU outcome reflected weaker stock availability as ASOS struggled to embed new automation software into the Berlin Euro Hub site. US sales growth was held back by a slower than the planned build of branded stock in the Atlanta warehouse as third party suppliers wrestled with compliance issues. "These issues have restricted product choice and availability for our customers in the US and Europe which has a corresponding impact on sales growth in these regions as well as profitability in the form of higher transitional costs to fix the issue," said Beighton. He added it would take until the end of September to resolve the problems. "Today's profit warning is the latest in a number of self-inflicted execution failings, a point that won't be lost on management," said analysts at Peel Hunt, who cut their recommendation on ASOS shares to 'hold' from 'buy'. Beneficiaries of ASOS's problems could be online rivals Boohoo, and Zalando, whose shares have risen 35 per cent and 80 per cent so far this year.