Beth Porter and Ben Please are a unique proposition which is unusual in music. They write songs about books — any book — and then play them in a bookshop.

The result is a charming, quirky, evocative folk sound which, on the evening I saw them, reverberated around the third floor of the famous Hatchards bookstore on Piccadilly.

A small crowd was assembled before them in a rather intimate affair in which Ben plays acoustic guitar, accompanied by Beth on her cello, whose splendid playing and…