The three pie charts compare the popularity of four political parties in a country one month before the June 2025 election and six and twelve months afterwards, together with the proportion of undecided people.
Overall, the Conservatives remained the most popular pary throughout the period, although their support eventually declined. Meanwhile, the proportion of undecided people increased considerably, while support for the Liberal Democrats fell steadily.
One month before the election, the Conservatives had the largest share of support, at 41%, followed by Labour at 27%. The Liberal Democrats ranked third with 18%, while the Green Party accounted for 10%. Only 4% of people were undecided.
Six months after the election, Conservative support remained unchaged at 41%, while Labour’s figure slipped slightly to 25%. The Green Party gained some support, rising to 14%, whereas the Liberal Democrats fell to 10%, equal to the proportion of undecided people.
By twelve months after the election, Conservative support had declined to 36%, although the party held a clear lead over Labour, whose figure had recovered to 27%. The proportion of undecided people doubled to 20%, while the Green Party returned to 10%. The Liberal Democrats experienced a further decline, reaching just 7%, the lowest figure among the four parties.