However it is Harold Edmondson who holds this accolade, making his first try for Bramley against Bradford Northern on 1 February 1919 aged 15 years 81 days.

[7] Wagstaff became the youngest representative in rugby league football when he turned out for Yorkshire age 17 years and 141 days,[8] and a few months later made his début for England against the first ever touring Australian side: the 'First Kangaroos' of 1908.

[9] He captained Huddersfield at centre in their 2–8 loss against Wakefield Trinity in the 1910 Yorkshire Cup Final during the 1910–11 season at Headingley Rugby Stadium, Leeds on Saturday 3 December 1910, played at centre, and scored a try in the 22–10 victory over Hull Kingston Rovers in the 1911 Yorkshire Cup Final during the 1911–12 season at Belle Vue, Wakefield on Saturday 25 November 1911, In 1914 Wagstaff was made captain of Great Britain, a post held during that year's tour of Australia and New Zealand.

Wagstaff played his last Test match in January 1922, when he helped Great Britain beat Australia and regain the Ashes.

Wagstaff and his contribution to Anglo-Australian rugby league culture were the subject of 2003's annual Tom Brock Lecture, given by Tony Collins.