Probably:
Civil Registration Indexes (Births)

Raymond A. Hadfield, reg. 4th quarter of 1900, Sheffield, Yorkshire West Riding, England
Robert Hadfield, reg. 1st quarter of 1904, Sheffield, Yorkshire West Riding, England
Richard Hadfield, reg. 3rd quarter of 1908, Doncaster, Yorkshire West Riding, England
Reginald Hadfield, reg. 4th quarter of 1908, Ecclesall Bierlow, Yorkshire West Riding, England
Ronald Hadfield, reg. 1st quarter of 1910, Ludlow, Shropshire, England
Robert Hadfield, reg. 2nd quarter of 1910, Bolton, Lancashire, England
Robert T. Hadfield, reg. 4th quarter of 1910, Burton upon Trent, Staffordshire, England
Ronald S. C. Hadfield, reg. 4th quarter of 1910, Tynemouth, Northumberland, England
Richard L. Hadfield, reg. 3rd quarter of 1912, Hull, Yorkshire East Riding, England
Reginald A. Hadfield, reg. 2nd quarter of 1913, Rotherham, Yorkshire West Riding, England
Robert Hadfield, reg. 3rd quarter of 1913, Hemsworth, Yorkshire West Riding, England
Reginald Hadfield, reg. 4th quarter of 1914, Ecclesall Bierlow, Yorkshire West Riding, England
Robert Hadfield, reg. 1st quarter of 1915, Wortley, Yorkshire West Riding, England
Robert Hadfield, reg. 1st quarter of 1915, Sheffield, Yorkshire West Riding, England

Remark: Some more R. Hadfield can be found in the internet.