

Introduction
Leonard "Len" Constance (birth registered October–December 1922 in Pontypool district — died c. 1990 in Wales) was a Lieutenant in the Royal Naval Volunteer Reserve and a Welsh rugby union and professional rugby league footballer of the 1940s and 1950s, playing representative level rugby union (RU) for Hampshire, and at club level for Newport RFC, Bristol, Portsmouth, Royal Navy, and Combined Services, as a Fly-half, i.e. number 10, and playing representative level rugby league (RL) for Wales, and at club level for St. Helens, Dewsbury, and Wigan, as a Centre, or Stand-off/Five-eighth, i.e. number 3 or 4, or 6.
Playing career
International honours
Len Constance won 3 caps for Wales (RL) in 1948–1951 while at St. Helens, and Dewsbury.
County League appearances
Len Constance played in Wigan's victory in the Lancashire League during the 1951–52 season.
Notable tour matches
Len Constance played Stand-off/Five-eighth, and scored a conversion in Wigan's 8–15 defeat by New Zealand at Central Park, Wigan on Saturday 3 November 1951.
Club career
On Thursday 20 January 1949, Leonard Constance was sold by St. Helens to Dewsbury for £2000 (based on increases in average earnings, this would be approximately £162,900 in 2013) along with Harry Street who was sold for £1000, the £3000 raised, contributed to the £4000 St. Helens paid Belle Vue Rangers for Stan McCormick.
Genealogical information
Leonard Constance's marriage to Elsie B. Nixon (birth registered April→June 1927 in Prescot district) was registered during October–December 1948 in St. Helens district, they had children; Susan H. Constance (birth registered July→September 1951 (age 65–66) in St. Helens district), Gillian K. R. Constance (birth registered January→March 1953 (age 63–64) in St.Helens district), and Michael S. Constance (birth registered April→June 1956 (age 60–61) in Pontypool district).