Populus polled the attitudes of 104 MPs (47 Conservative / 42 Labour / 15 Other) in June/July 2016 and 116 MPs (47 Conservative / 57 Labour / 12 Other) in May/June 2018 using a mixture of paper and online surveys. Data have been weighted to be politically representative of the House of Commons. Weighting is calculated on 640 seats (excludes Speaker, Deputy Speakers, Sinn Fein and vacant seats).

All comments have been anonymised. Where % results do not sum to 100, this may be the result of rounding or the exclusion of’don’t know’ categories.