(From Wikipedia)
Motörhead, founded in 1975, was the first important band to straddle the punk/metal divide. With the explosion of punk in 1977, others followed. British music papers such as the NME and Sounds took notice, with Sounds writer Geoff Barton christening the movement the "New Wave of British Heavy Metal".[119] NWOBHM bands including Iron Maiden, Saxon, and Def Leppard reenergized the heavy metal genre. Following the lead set by Judas Priest and Motörhead, they toughened up the sound, reduced its blues elements, and emphasized increasingly fast tempos.[120]
By 1980, the NWOBHM had broke into the mainstream, as albums by Iron Maiden and Saxon, as well as Motörhead, reached the British top 10. Though less commercially successful, other NWOBHM bands such as Venom and Diamond Head would have a significant influence on metal's development.[121] In 1981, Motörhead became the first of this new breed of metal bands to top the UK charts with No Sleep 'til Hammersmith.
