Short answer - it depends!
DD1 finished 2 years ago - has a 2.1 in Linguistics which she will probably never use, and c £12K student loan debt (has just about paid off other loans). Currently doing a temp job with Social Services, but plans to do PGCE and then teach Primary.
DD2 has just finished her first year doing the Social Work degree (a new thing, it used to be just a post-grad diploma). Her tuition is paid by GSCC and she gets a bursary from them of £2500pa on top of her loan; she will still come out owing at least £12K but at least will then work in the field she has studied in and the costs seem worthwhile.
DS1 is in Y13. He would like to do a Politics degree but his AS level grades were only high average even with resits, and his A2 levels will probably not be much better (he's brilliant in class but not so good at homework and revision). He wouldn't get a place on one of the best courses with his grades, and it would be mad to incur debts of £7000+pa (£3K tuition and £4K loan) for that so he is taking a year out and thinking about it.
It's a shame in one way because he has a good mind and understands a lot about how it all works, and a few years ago would have gone without anybody thinking twice about it; but OTOH he would probably have skived his way through and all of you would have paid for him. FE needs a big shake up IMHO.
DS2 is only in Y8 - will cross that bridge when we come to it.
(DH has BSc in Computing Science but from a former Poly, not a uni. I also went to a Poly, did a 2-yr HND, failed
)