Sparks flies: how frumpy Marks & Spencer became fashionable again

Four years ago the venerable retailer fell out of the FTSE 100, suffering a humiliating blow to its prestige. But now it has turned things aroundIt’s four years to the day since Marks & Spencer dropped out of the FTSE 100 for the first time since the City share index’s 1984 inception.It was a major blow for one of the UK’s biggest retailers – and symptomatic of a series of existential problems it faced. Share prices were close to a 20-year low; annual profits had slum