These estimates show that while the national result of the referendum was relatively close, with 52% voting Leave and 48% voting Remain, a much larger majority of parliamentary seats voted to Leave – with 64% of seats in Great Britain voting Leave. (This is likely due to the uneven distribution of Remain voters, who tended to cluster in large cities, while Leave voters were more evenly spread.)

According to these estimates, around 75% of constituencies that were won by the Conservatives in the 2017 general election voted to Leave, while around 61% of Labour constituencies voted to Leave. All seats won by the Scottish National Party and the Green Party, and a majority of the seats won by the Liberal Democrats and Plaid Cymru, voted to Remain.