New Labour, New Danger was a political campaign launched by the UK Conservative Party in the early 2000s, during the tenure of Prime Minister Tony Blair and the New Labour government. The campaign focused on portraying the Labour Party as a threat to national security and stability, highlighting issues such as immigration and crime as evidence of this danger.
Univers 85 Extra Black, created by Adrian Frutiger, is most likely the font used for the slogan in the poster. The font is a commercial one and you can view and download it here.