The cost of a pint of milk could rise unless Brexit negotiations settle a trade and labour deal, the UK’s dairy farmers have warned.

The industry - which employs more than 70,000 people - said Britain leaving the EU without striking a deal and having to resort to World Trade Organisation tariffs would be “the worst outcome”.

Calling Brexit a “monumental and game-changing challenge”, Paul Vernon, chairman of trade body Dairy UK, said the industry has “tremendous potential for exports and product development” if a deal can be reached.