Tony Shiret, one of retail’s highly regarded analysts and a vocal critic of Marks & Spencer under Sir Stuart Rose, is to take up a new role at Royal Bank of Scotland.

Shiret was made redundant from Credit Suisse in June, after 18 years with the bank. He will join RBS in November.

At RBS, Shiret will cover the big non-food retailers across Europe, as well as the sports retailer Adidas. He will work alongside Justin Scarborough, who covers the food retailers, and John Guy, who covers non-food and luxury retailers.

Shiret told the Financial Times: “We will have a strong team, covering retail, consumer and luxury.”

Shiret is most known for his criticism of M&S under Rose, publishing several notes on the direction the company was taking. However, under the leadership of Marc Bolland, he had softened and last October he dropped his Sell recommendation on the stock for the first time in almost three years.