On a turnout of two-thirds of the workforce, over 70 per cent voted in favour when asked if they wished Prospect to bargain on their behalf. A previous ballot had returned an overwhelming vote in favour of collective bargaining.

Branch chair Simon Norris said: "I am delighted we received a decisive vote with a high turnout. This gives us a platform to take staff representation to a new level and give union members a real say in their employment."

Negotiations officer, Jez Stewart, added: "Historically, there was an absence of negotiating rights when it came to pay, hours and holidays. We are committed to this welcome development which will further enhance the relationship between the union and the NDA."