The General Secretary of the Public and Commercial Services union, Mark Serwotka, says his members are on strike because the changes the government is making to the pensions of public sector workers are unnecessary and unfair.
He said yesterday's Queen's Speech showed how out of touch the government is with the majority of public sector workers who "don't go on strike lightly."
Have today's public sector strikes had the desired impact or did they simply fall short?
Unions have warned that strikes by public sector workers in the row over pensions will continue following a day of walkouts and protests.
UKBA workers strike against government cuts, but can Britain's borders be properly policed with a cut to their workforce?