Pioneers of hard rock and what became known as heavy metal, Birmingham’s doom-laden quartet have had such a major influence on rock music they deserve a metal statue the size of Big Ben. Instead they must be satisfied with a meteor storm of honours and tributes from all over the rock universe. From their startling self-titled 1970 debut through the classics Paranoid and Volume 4, to 2013’s surprisingly vital 13, the Sabs have turned deafening lo-fi guitar-drenched thunder into an art-form. Many consider their first half-dozen albums essential. That’s six straight albums, all resoundingly powerful and consistently enjoyable. Thor would approve.