Around 500 Unite union members at energy firm EDF struck over pay on Tuesday and Thursday of last week.
Bosses have failed to implement a 2012 pay agreement and offered a measly 2 percent for 2013.
Picket lines were big and lively. Some 80 strikers picketed in Bexleyheath, south east London, and more in other parts of England.
A planned protest at EDF’s headquarters was called off after bosses threatened to seek an injunction.