Hercules the reality is that he will need to do a Masters first which he will have to self fund. If he has a first and a distinction for the Masters he will get funding for a PhD but perversely even this has changed. Whereas before the student shaped the thesis proposal and chose a supervisor to apply to, now the supervisor has the funding and calls for a PhD student to work on a narrowly defined topic of the supervisor’s choice. This really distorts the direction of research and forces young people to pursue the research interests of others.
Then he will have to complete a PhD really quickly (3 years ideally and no longer than 4), while getting some experience at teaching, attending conferences and, crucially, getting published (peer review is time consuming and rejections are frequent - most journals have a 10-15% acceptance rate - so that adds a lot of stress).
He then faces the horror of the nine month teaching contract. Competition for these crap jobs is fierce. They only last nine months so you need to do something else to survive for the rest of the year, they can be anywhere up and down the country which makes family life impossible, they are heavily (if not exclusively) weighed towards teaching so there is no time to do research, and the pay is crap.
A better route isn’t to try for a research fellowship, get more work published and then have a stronger CV for a permanent post.
Having said that, even permanent posts are not very secure. Many departments either downsize or are not properly funded and staffed to the point where workloads are ridiculous (workload models that tell you you are working at 120% but there is no change from year to year, working evenings and weekends). Many departments are looking to push people into teaching only contracts which defeats the purpose of wanting to do philosophy because you enjoy the research. And the admin burden is out of this world. You are constantly working towards a TEF or a REF or a student satisfaction survey or god knows what they will think of next.
It is a stressful career, with a lot of'pressure, constant rejection and conditions that make family life difficult with no monetary compensation.
Sorry that sounds awful but it’s best he goes into it with his eyes open. The idea that academics had low salaries but were free to'pursue a topic they loved dies in the early 1990s.