Trade union activists across Britain warned David Cameron and his worker-bashing corporate backers yesterday that they will have no peace until blacklisting is wiped out.

Demonstrations and lobbies marked a TUC-backed day of action to demand a powerful public inquiry into the vicious practice which ruins lives, plus full compensation for thousands of victims.

In Leeds a peaceful demonstration outside a shopping centre where leading blacklisting company Robert McAlpine has an office led to a protester being hospitalised by heavy-handed security.