Retail giant Marks & Spencer claims its Blue Harbour brand spin-off, the Abercrombie & Fitch-styled Blue Harbour Vintage range, will boost sales and account for a third of the brand's revenue.

According to acting head of menswear Andrew Skinner, the style of the new range falls somewhere "between Blue Harbour and Abercrombie".

"We are confident it will deliver a third of Blue Harbour sales," he said.

According to M&S, Blue Harbour is the biggest selling men's casual apparel brand in the UK.