The NHS and Brext replaced immigration as the biggest issue facing Britain across the whole of 2017. Across 2017 the biggest issue facing Britain was the NHS, mentioned by nearly half of the public (48%) Concern about Brexit was in very close second place (46%), and was the biggest single issue of the year Worry with immigration fell notably; one quarter (26%) of the public mentioned it as an issue in 2017, compared with 40% in 2016