UNITE has urged a top charity boss to resign after a “shameful” misdirected email showed that he is trying to “erode” union support in the workplace.

Howard Sinclair, CEO of homelessness charity St Mungo’s, sent an email which suggests he was working with BLJ London, a prominent PR consultancy firm, to stop people at the charity joining Unite.

The message, which was accidentally sent to the inbox of a Unite official, said that there was “no need” for the company to “change tac [sic]” after an industrial dispute this summer regarding proposed change that could lead to pay cuts and job losses.