★★★★☆ Working in collaboration with UCL Neuroscience Prof Kate Jeffrey, Theatre Re under the direction of Guillaume Pigé, took three years of research and improvised experimentation to make this piece, which was a British Council Edinburgh showcase production last year.

★★★☆☆ Jonathan Fensom’s set of the study in 221B Baker Street was lovingly adorned with detail – picture rails, fireplace and gas and electric lights. The sweep of a full curtain across the stage revealed new tableaux each time it passed, but it failed to reveal the level of excitement that would ­­have sustained a Conan Doyle original.