Mick Fleetwood and Stevie Nicks have led the tributes to Fleetwood Mac co-founder Peter Green following his death at the age of 73.Fleetwood and Green formed the influential group in London in 1967, alongside John McVie and Jeremy Spencer.Nicks signed with the band in 1975, five years after Green had quit amid struggles with his mental health.After his death was announced on Saturday, tributes poured in from across the music industry, with the musician lauded as among the greats of the British