Here in the UK is where I went to university

[GoldfishLord]

Hi, I'm Paula I'm one of the R&D Graduate Students here at AstraZeneca. I'm originally from Spain from the north coast but I have lived in several countries including Austria, the UK and the US. Here in the UK is where I went to university, I did biotechnology at the University of Surrey.

Source: https://www.abpi.org.uk/careers/job-case-studies/r-d-graduate-scientist-2/

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Is "where I went to university" the subject of the sentence?

 

[Tarheel]

"Here" is the subject of the sentence.

 

[güey]

Here in the UK: subject.
where I went to university: subject complement.

 

[GoldfishLord]

Here and there in front position​

We can use here and there in front position, with the subject and verb inverted. The most common expressions of this type are here is x, here comes x, there is x, there goes x:

A: Here’s the CD I said I’d lend you, the Brazilian music.
B: Oh, thanks.
Here comes your taxi, so we’d better say bye bye now.

Source: https://dictionary.cambridge.org/grammar/british-grammar/here-and-there

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What's the reason "here in the UK" is the subject of its sentence even though "here" and "here" are not the subjects of their sentences?

 

[güey]

Because those are different grammatical structures.

Here comes your taxi, so we’d better say bye bye now.

Here comes your taxi.
Inversion. Your taxi is the subject, comes the verb.

Here is where your taxi comes.
Here, acting as a noun, is the subject. Where your taxi comes, a noun clause, the subject complement.