Fresh from well received performances on the festival circuit, particularly the BBC-broadcast Glastonbury, Sleaford Mods have been exposed to a wider audience and remain masters of polarisation. They have become poster boys for the disenfranchised: they’re proud of their roots but they don’t want the music to be undermined or people to misconstrue their working-class stance as validation of lout culture. They are quick to disassociate themselves from the hooligan element, or as vocalist Jason Williamson put it: “If you’re expecting some kind of cross between This Is England and Twycross Zoo mixed in with The Firm then please do…