Are all Biology graduates in low paid jobs?

No? Maybe straight out of university yes but you could be earning up to 100k a year.

Nah, loads of them go into banking

no

worth mentioning that for a lot of things you don't need a specific degree. so you'll get people from all sorts of degree backgrounds applying for things in finance for example.

no idea on the stats though.

"All" is a pretty sweeping statement, and obviously at least some won't be - students whose parents are wealthy oil barons and can ask uncle Throckmorton to give them a job at his hedge fund, for example.

Most graduate roles don't require any particular degree, and it's really going to be dependent on you getting and leveraging relevant work experience/internships etc. If you want to do something specifically using your biology knowledge, outside of further graduate work, then your opportunities may be more limited though.

Stats say Bio graduates are most low paid.. don’t know if this means it is because a lot go onto do PhDs and do part time work, or if this is rlly the case

https://www.timeshighereducation.com/student/news/highest-and-lowest-graduate-earners-degree-subject-uk
seems like biology graduates are pretty average if you look at this table. And yes probably more people go on to PhDs which often pay around 15000 (or are self funded) which will obviously bring the average down)

So can people go into well paid jobs , without doing PhDs.

As said above biology is average in terms of salaries and definitely below business, economics and the other STEM subjects. You can go into a lot of industries like finance, consulting, accountancy or even law, which recruit from all degrees, BUT you need to start getting work experience, internships and the like from 1st year.
If you want to do research, you usually need a PhD, otherwise you'll find it difficult to find positions other than technician jobs, and without much career progression.
Another option which pays well is medical sales, which seems a big market and doesn't require a post-grad (usually).

It probably depends on the area. I spent a year working at a pharma company and there seemed to be a bit of a glass ceiling on the research side of how far you could progress without a PhD. But if you wanted to use your knowledge in something else e.g. marketing, sales you probably wouldn't face that issue.

Obviously not.

Nah, loads of them go into banking

Would I be able to go into these careers at a later stage in life? Not right after graduating?

Is it hard to do so with a Biology degree, compared to other subjects ?