But he faces strong competition from grime artists Stormzy and J Hus and ... "We were only allowed to talk about positive things," said Mumford of the deliberations, "so I shut up quite a lot".

These specialists prove that some things, like excavating sewage pipes ... require specialized skills due to the accumulation of grime over time — think clearing out an air vent that hasn ...

Mykaell Riley, director of the Black Music Research Unit at the University of Westminster, says grime is "an outsider". "The genre said 'we're not going to do things in a conventional way'.