Deltapoll surveyed 2,022 respondents online on 13th and 14th December 2018. Data are weighted to make them representative of the adult population of Britain with respect to age, educational attainment, gender, region and social grade. The data are also weighted to the distribution of the vote (including abstention) at the 2016 referendum and 2017 general election. Deltapoll is a member of the British Polling Council and abides by its rules.