You've got some baseline regional power bases.

- Lib Dems: South West
- Conservatives: Rural Areas - South, South East, East Anglia, Home Counties, Fens
- Labour: Industrial North, Towns and Cities. Wales and Scotland will often go Labour when Labour win nationally.

While that looks like it covers a lot of land for the Conservatives and the map can look very blue even with a Labour national win, they're large constituencies with lower populations. There are more constituencies in the towns and cities which tend to lean Labour.

The reason the Lib Dems get so many more seats than Reform despite their lower vote total is this regional aspect of their support. Reform voters are scattered across the country in a more uniform manner where Lib Dems are far more focussed on the South of England.