By Daniel Hunter

Barclays chairman John McFarlane has banned staff at the bank's head office from wearing flip-flops and jeans.

The chairman, who fired chief executive Antony Jenkins last month and took over the role himself in the mean time, is understood to be clamping down on staff behaviour, and fashion.

Barclaycard interim chief Amer Sajed sent a note to staff, saying that Mr McFarlane had been impressed with most areas of the division's behaviour and culture. But he said that flip-flops, and jeans, are not suitable for a Canary Wharf bank.

Barclaycard considers itself to be closer to tech startups in terms of behaviour and culture, than the traditional suit and tie culture of the City. As a result, its staff have been given a more relaxed dress code.

The majority of its staff are based in Northampton, but many do work in Barclays' head office in Canary Wharf. According to Mr Sajed's note, John McFarlane does not want to see bare toes, t-shirt or jeans. Staff are still allowed 'dress-down Fridays', but flip-flops are still banned on those days.

In the note to staff, Mr Sajed said: “As the worldwide headquarters of the Barclays group, One Churchill Place is an important and iconic building. With key client representatives and high profile guests regularly visiting the building it's important that we present the right image of the business and that colleagues working in 1CP [1 Churchill Place] represent Barclays at its best."

“Now defining ‘business casual’ is not easy — just try Googling the term to see what I mean! — but if you work on the premise that the overall objective is to project a professional, business-like image without being obliged to wear formal business attire then you should be fine. Principally it means no jeans, t-shirts, trainers or flip-flops (although - with the exception of flip-flops - more casual dress is acceptable on a Friday).

“There are no plans to change any other aspects of the working environment or culture in 1CP or indeed the dress code in other offices — on the contrary, John McFarlane, Barclays’ Executive Chairman, has been enormously complimentary about the energy, culture and entrepreneurial spirit of our business and is very supportive of our growth agenda.”