For completeness, it looks like William's first marriage was to Esther Mary Stevenson, registered 1907, district of Chester. From newspaper archives it appears they separated in 1912 and divorced in 1915.
From earlier replies, the following records presumably show William's second wife:
Birth of Ann Haynes Caddick, mother's maiden surname Bussell, registered Q4 of 1876, district of King's Norton
Marriage of Ann Haynes Caddick & Arthur Kendrick, registered Q4 of 1898, district of King's Norton
Death of Ann Haynes Hughes, age 68, registered Q4 of 1944, district of Birmingham
Hughes Ann Haynes of Elmstead Buckingham-avenue Shoreham-by-sea Sussex widow died 12 December 1944 at 92 Edgbaston-road Cannon Hill Birmingham Probate Birmingham 7 May to Reginald Arthur Evans solicitors clerk. (Probate index, 1945)
Arthur Kendrick and wife Anne Haynes (Lily) buried Weeford, Lichfield, Staffordshire
www.findagrave.com/memorial/186410391/anne-kendrick