Cooper supported Remain in the EU referendum. Following the vote, she said she was “in shock” at the result. She added: “There has been a lot of nonsense on both sides but I have certainly never been one for scaremongering. I actually do think this will leave the NHS worse off though. I really do worry for its future”. She also said it was “a time of great uncertainty for business owners in general”. In September 2017, she voted against the European Repeal Bill.