What comes to mind if some-one says the 1920s? What about the 1930s? The gloom and doom of Depression and the Jarrow march? Or flappers and frivolity, art deco and champagne? Was it a period of labouring under the fall-out of the Great War: a lost generation, a General Strike and political instability? Or a period of unbridled optimism, female emancipation, increased leisure and general social improvement?