These images from our archives show workers on the picket line across the decades.
5. Social Workers
Pickets at Sheffield Town Hall during the social workers strike in March 1979 Photo: Sheffield Newspapers
6. Teachers
Protesting teachers pictured with their banners outside the Sheffield City Hall in 1969 Photo: Sheffield Newspapers
7. Firemen
Firemen picketing the Division Street Fire Station, Sheffield, in November 1977 Photo: Sheffield Newspapers
8. BT
British Telecom pickets outside Telephone House, Charter Row, Sheffield, January 1987
Photo: Sheffield Newspapers