British sculptor Sir Anthony Caro has died of a heart attack at the age 89, his family has confirmed.

Sir Anthony was widely regarded as the greatest British sculptor of his generation and worked as an assistant to Henry Moore in the 1950s.

Tate director Sir Nicholas Serota called him “one of the outstanding sculptors of the past 50 years”.

Among his many prizes was 2008’s Jack Goldhill Award for Sculpture for his piece Promenade.

Awarded by the Royal Academy of Arts, the £10,000 prize goes to the creator of “an outstanding piece of sculpture”.

The artist had vowed to keep working until he was 100, as he unveiled his most recent exhibition at the Gagosian Gallery in London in June.