Received his professional training at the London Hospital, where he was House Physician, also Clinical Assistant in the Out-patient Department. He was next Surgical Registrar and Anaesthetist at the Hospital for Sick Children, Great Ormond Street, and Clinical Assistant at the Royal Ophthalmic Hospital, Moorfields. For a short time he practised at 5 Crouch Street and 26 Head Street, Colchester, and then became Surgeon on the Orient Steam Navigation Company's vessels. In 1894 he again began general practice at 68 Porchester Terrace, London, W, then settled definitely at Harcourt House, Camberley, and took part in local affairs. For three years, 1899-1902, he was Chairman of the Frimley Urban District Council and of its Sanitary Committee. He entered the Council again in 1905 and was Chairman from 1911-1913, besides being Medical Officer of Health and Vaccinator. Rayner was an all-round sportsman, enthusiastic over football, motoring, cricket, and yachting. He first started a West of England Football Club, the Camberley Hospital Football Cup Competition, and was the donor of a handsome Rayner's Challenge Cup. His cheerful manners endeared him to all, and a bed was named after him in the Cottage Hospital. Illness had compelled him to give up practice in 1913; for some time before that he had as partner William Lumsden Stuart, MRCS. Nevertheless he had offered himself for service at the front, when he died at Brighton, after a short illness, on October 11th, 1914. His funeral was largely attended. He was survived by his widow and family.