He was educated at St Paul's School and the Royal Academy of Dramatic Art, where he won a gold medal.
He made his first professional appearance at the age of 19, as Demetrius in Sir Herbert Tree's revival of A Midsummer Night's Dream at His Majesty's Theatre.
[1] After the First World War he resumed his theatrical career in Reparation at the Lyric Theatre, Hammersmith, followed by parts as diverse as the Cardinal in The Duchess of Malfi and Laurence in Paddy, the Next Best Thing.
[1] In 1923–24 he was the leading man at the Old Vic, and in subsequent years he was seen in The Wild Duck, The Way of the World and many other plays.
[4] Swinley died suddenly at his home in Kensington on 16 September 1937, during the run of The Comedy of Errors at the Open Air Theatre, in which he was playing the Duke.