UNITE leader Len McCluskey vowed to continue exposing and holding to account “bad bosses” as he formally launched his re-election campaign yesterday.

Mr McCluskey is seeking another term in office, saying his members need someone who is experienced and “fearless” to tackle the continuing Tory onslaught on the working class over jobs, pay and conditions.

His current five-year term was due to end in 2018, but Mr McCluskey has brought forward the election by a year to next spring as the union faces one of the toughest fights in its history.