I’m based in Sweden, but I don’t think there’s that much of a culture difference in the IT sector compared to the UK, based on people I’ve met and worked with from there. I just want to add that the advice I’ve seen here so far match my experience as a senior developer / consultant / lead.
If I was to pick one thing above all others, it would be:
Very much this! When I am interviewing applicants, I am looking especially for the ability to reason about code, and technical solutions. I’ll never ask anyone to write code on the spot, because I don’t think that’s a relevant test, but I love it if they bring in something from their portfolio that we can have a discussion about how they solved it.
I think coming from a bootcamp background could be a bit harder to get that first job compared with a university level education, but certainly quite possible, and a portfolio helps a lot. Once you’ve worked for a while, actual job experience and recommendations from colleagues will be worth much more than a fancy degree. (I’m biased the other way from @strategy since I got started without any kind of degree :)