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This chart from @TheEconomist is outstanding, so I thought I'd have a go at replicating it for every election in my lifetime. #ge2019data

economist.com/graphic-detail…
Not a very clear picture in 1987 vs 1983. Labour constituencies got more Laboury, but not much else.
1992 saw a big sweep towards Labour, but not enough to take power.
1997 = LABOUR APOCALYPSE
2001: nothing happened

Notable though that no constituency had >60% voting Conservative
2005 saw a seep away from Labour towards both the Conservatives and, in many places, the Lib Dems
A very big move Tory-wards in 2010
2015 = EVERYONE HATES THE LIB DEMS
2017: Some moves Labour-wards, and everyone still really hates the Lib Dems
We can also look at the trajectories of individual constituencies. Here's Sheffield Hallam - a bit of a wanderer.
All data from the fabulous House of Commons library researchbriefings.parliament.uk/ResearchBriefi…

All plots drawn in R using {ggtern}

Happy to take requests for constituency plots!
Realised there was a slight error in the 2015 map - some of the constituencies changing hands hadn't been highlighted.

So here us the full, corrected, version of that Lib Dem nightmare:
Found some bonus strangeness in the raw data which made the 1997 Labour apocalypse look a bit too apocalyptic. Here's the revised (although still fairly apocalyptic) picture:
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