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  • any idea how these are modelled for seats where the boundary has changed quite a bit?

    With a lot of complexity.

    In essence by taking historical voting patterns, other boundary information of different granularity like council elections, etc, and attempting to project from those the likely demographic, and then mapping the existing polling to the demographic.

    Most tactical voting websites will just show historical seat voting, as it's unambiguous and easy to communicate, but their recommendations are made in a more complex way to try and make the most likely to win recommendation factoring in the changes.

    There are a lot of spreadsheets involved.

  • Cheers, some of the new seats appear to be weird hodge-podges of Labour inner and Conservative outer London so was wondering how they would be forecast.

    Lots of spreadsheets can only be a good thing.

  • I’m in what was Bromley and Chislehurst, but seems to be have carved into perhaps more balanced constituencies.

    Anyway my Con MP

    When his Saturday afternoons aren’t taken up with politics or sport, he loves enjoying the abundance of green space locally with his partner and daughter.

    Nice to know he only likes his family when he has nothing better to do.

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