Thorntons said on Tuesday that it had seen a "significant reduction" in expected orders from the major grocers, who also took in stock later than anticipated.

British grocers have been suffering in a market hit by price deflation, stagnant wage growth and increased competition.

Cash-strapped consumers have been shopping around to save money, shying away from big weekly shops and buying little and often in local convenience stores or online.

"Short-term difficulties" at Thorntons' new, centralised warehouse compounded its woes, with lost and late sales at its UK commercial unit leading to missed promotional slots and reorders.

Thorntons, which has already posted a drop in first-quarter sales due to subdued consumer sentiment since Easter, said the warehousing and distribution facility was now "working normally".

(Reporting by Richa Naidu in Bengaluru; Editing by Sunil Nair)