Sir Frederick Hayday, CBE (26 June 1912 – 26 February 1990) was a British trade unionist who served on many public bodies.
He was elected District Organiser of his father's union, the National Union of General and Municipal Workers,[1] dealing with gas, iron ore, gypsum mining, road haulage, brick making, and public services and as a member of Regional and National Joint Industrial Councils for many industries, serving in some instances as secretary to the JIC.
During World War II, Hayday was appointed by the Lord Chancellor to the North Midlands Aliens Tribunal and served as a member of Labour Supply Committee for the Chemical Industry, and on many wartime panels dealing with labour problems, military hardships’ committee, etc.
In October 1960 he was appointed as a member of the Constitutional Commission for Malta in place of Sir Alfred Roberts who had been taken ill.
He led a team of European trade unionists to the United States to study radiation problems.