Instantly recognisable for his fluorescent spiked hair and incendiary performances, the musician sang lead vocals on both the band’s number one singles, Breathe and Firestarter.
He was found dead at his home in Dunmow, Essex, on Monday morning.
Police said they were “called to concerns for the welfare of a man” just after 08:00 GMT. “Sadly, a 49-year-old man was pronounced dead at the scene.
“The death is not being treated as suspicious and a file will be prepared for the coroner.”
Flint had recently returned to the UK from a tour of Australia; and was due to start a US tour in May.