M&S profits hit.
Overall UK like-for-like sales fell 5.3% in the 13 weeks to June 28 amid the tough high street conditions.
M&S posted profits of pounds 1 billion last year but chief executive Sir Stuart Rose, said: "At our preliminary results in May, we reported a mixed start to our 2008/9 financial year and expressed caution about consumer sentiment.
"Since then, consumer confidence levels have deteriorated markedly and market conditions have become more challenging."
The director of M&S's food business, Steven Esom, is also leaving the business with "immediate effect", the group said.