When four unlikely working class lads from Sheffield dropped ‘Whatever People Say I Am, That’s What I’m Not’, 10 years ago, it became the generation-defining debut album of the new millennium. Not since ‘Definitely Maybe’ had there been this much hype around a British debut LP. And so it went on to prove, shifting 360,000 units in its first week, smashing the records to become the fastest-selling debut album in British music history.