Choosing the right uni is very important. There is no point doing 'law' or something like that at an ex-polls and expect to actually be able to get a training contract.
Likewise you are often best placed going to an ex-polly for some of the 'newer' subjects as they often have better established, more respected courses with better links to industry
If you just want to do a general subject degree like English Lit or Economics of Geography and then go into a standard graduate job, I think you do need to go to a decent uni and get a 2:1.
I completely agree with that. When I was helping my son choose, I wrote every single uni out of a piece of paper, in the order in which they were ranked that year, and then drew lines to separate the top, middle and bottom thirds, and told him to concentrate on looking at the bottom of the top third or the very top of the bottom third, with maybe one 'long shot' thrown in for luck. I felt that based on his predicted results that was his safest bet of getting a nice bunch of offers from respected unis, rather than aiming too high or doing that herd thing of going 'must be RG, must be RG' and ending up with nothing, due to massive over subscription, and having to take someone completely shit at clearing.
He got a full set of five offers, which was a lovely position to be in. He only applied to one RG (which was not his optimistic 'long shot', funnily enough.) which he ended up turning down because it as not as well regarded for his course as other non-RGs on his offers list.