Unemployed / underemployed since 2015 with a first class degree in physics

..............

You seem to be applying all over the place, Physics, Maths, NHS science, BA, graduate medicine, nursing .... you simply can't be credibly competitive in all these areas. You need to pick a sector, and focus on developing a credible profile, step-by-step, to make a career in that sector. The answer seems to be, just get a job that starts off a career path. I know that's not easy, but you aren't getting internships, settling in higher ed, managing to change direction etc, so it's no more difficult that any of that.

Decide a path that both your heart, your confidence and your previous experience can deal with. Then work backwards from the 'dream job' and work out what steps might be needed, and what the entry point to that might be. For example, and I don't have much to go on, and might be in the wrong direction but 'Research Physicist' might be an end goal - they need a knowledge of physics, they don't have to be uber confident, they need to comfortable in an academic environment, so it seems a reasonable goal.

So now, work backwards and think how to get there. A PhD isn't he only way, think about the technical route, Technical Assistant, which starts off as an entry level Lab Tech (job titles may vary, that's part of the job research).

Now, where do you look for those jobs? Research companies, pharma, technology etc, but you want physics which reduces commercial opportunities (unless you go for engineering side, in which case manufacturing might open up) and leaves Universities. Do you live in/near a University? What about your undergrad Uni, nothing a Uni loves more than recruiting it's own graduates. Stalk Uni jobs pages and begin to learn what sort of jobs turn up.

It might not be Physics that is your focus. But broadening really only happens when you have time and financial support behind you. When you are under pressure of time and earning, then you need to focus and work out the small steps you need to take.

............

I suspect we need to get into details that ought not to be on a public site. If you want to open a thread in CV Help, I can take a look at your CV and we might be able to piece together some stronger options.

I will give it a go but how does this work exactly? I am (by my own admission) rubbish at writing CVs so general advice won't get me very far. Ideally I would like someone to help me produce a one page CV and we could tailor it to a specific role like data analyst. Is that something you could help with?

Yes, I can do that, though you have to give me enough material to work with! OPen a thread in the CV Help forum, the forum will look empty, because you can only see threads you have started yourself. Then only you and I can see the thread, so you can upload your CV as a Word doc, preferably with a job description for me to work from, and then I'll see what I can advise.