David Hockney at Tate Britain: a visual diary of the artist's colourful life

With Tate’s fastest-selling exhibition set to open, co-curator Chris Stephens says the artist is finally happy looking to the pastIn the vibrant world of David Hockney, there is always light. It illuminates the fields of Yorkshire, casts shadows across the bodies of lovers, gives ethereal beauty to the Hollywood Hills and, most of all, it bounces off the shimmering blue surface of swimming pools.Now six decades of these paintings, drawings and collages have been brought together under one