Cherry Ghost started as the solo project of singer-songwriter Simon Aldred, and this the first single, a beautiful waltz-time piece.
Wikipedia describes this as “chamber pop”, which it describes as “a style of rock music characterized by an emphasis on melody and texture, the intricate use of strings, horns, piano, and vocal harmonies, and other components drawn from the orchestral and lounge pop of the 1960s”.
This is not a bad description of this song at all, to be fair.