One of the best things about Beehives, Bobs and Blow-dries — yep, an exhibition about hairdressing — is the reaction of visitors. Some are getting on a bit and their pangs of recognition as they pass 1970s straightening tongs or Carmen heated rollers are evident. One woman exclaimed, as she passed a Ronson hairdryer with its shower-cap hood, ‘Ooh, they were good, they were.