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The pupa looks like it has rather a lot or red on it.
It could be a black one with red spots (melanic form).
I seem to think that the pupa
a is a sort of negative image of the adult.
I just did a google search and found that short form as the only option, I wasnt aware of the current accepted scientific name but thanks for adding it.
The pupa is unhatched, so is not a former home of the adult, although it is the same species. 7-spot pupae are quite often this orange - it's not connected to the colour of the adult form. There are a couple of melanic forms of 7-spot, but they're exceptionally rare.
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Lat/Lng: 55.041, -5.97
OS grid ref: NW464790