Deltapoll surveyed 2,001 respondents online between 8th and 11th March 2019. 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.