'A fearless reputation for collecting modern art': The Hepworth Wakefield gallery – video

'A fearless reputation for collecting modern art': The Hepworth Wakefield gallery – video. Yorkshire's new Hepworth Wakefield gallery, which celebrates the work of sculptor Barbara Hepworth, also contains a remarkable archive of correspondence that highlights Wakefield's reputation as an avant-garde collector of art. Martin Wainwright pays a visit