Boozers were decked with purple balloons and flags; murals were everywhere you looked; people donned Ozzy outfits, flooding the streets with battered T-shirts and denim jackets. It felt like a World Cup final for the metal fans who flooded in from every corner of the planet .

Ozzy Osbourne and Black Sabbath have gone out with a bang at what they say will be their final gig, in front of 40,000 fans and supported by an all-star line-up of rock legends who have been influenced by the founding fathers of heavy metal.