Here's a nice colourful map, but what does it show?

I've not done one of these for a while so let's have a bit fun with one. Here's a map of the UK with different areas coloured in pretty colours but what does it show?

If you're in the UK please don't give the game away.
Heres a nice colourful map, but what does it show?
The third most common gender
The favourite colour of under 5s
The political party in power
The most popular sexual fetish
The most popular car colour
Percentage of people who know their neighbours name
Select gender and age to cast your vote:
Updates
5 mo
Correct answer is the political party elected in charge of that area.
Here's a nice colourful map, but what does it show?
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