Turner’s rarely seen watercolours take centre stage in Bath

Exhibition at Holburne Museum features 32 experimental land and seascapes that chart artist's evolution

• Why JMW Turner is still Britain's best artist, 250 years on

It is, says the curator Ian Warrell, a little like peering over JMW Turner's shoulder as he puzzles out how to create the sweeping land and seascapes that made him one of the greatest ever.

An exhibition of the artist's rarely seen watercolours is opening in Bath, which includes scenes of the English West Country that he created as a teenager to a series of sketched seascapes when he was a much older man gazing out at storms off the Kent coast.