I have two death certificates which might relate to John MILES and his wife Mary.
John MILES, a farmer, died 16 Mar 1850 at Hurley, Kingsbury Parish aged 36.
Mary MILES, wife of John MILES Builder, died 11 July 1851 at Canwell, aged 38.
Unless the Registrar confused professions, these both can't relate to John & Mary MILES, but one of them might correct.