Umm, well, is the number of students going on to postgrad study taken into account on these graduate employment tables, or are all we PhD students classed as 'the unemployed'? Because might that explain why some otherwise poor universities do surprisingly well on that particular table?
This is not to detract from anything that's been said here in favour of Oxford Brookes, which is a good university with good teaching (and Eubacterium, what you say about poor teaching standards in lower-ranking universities is a ridiculous and misguided generalisation. I know more than one tutor at Oxford who has also taught at Brookes, and vice versa). The bottom line is, if you go to Brookes and want to do well, nothing will stop you. I knew quite a few students there while I was at Oxford (a friend on my course was living with them), and all were bright, interesting and had no complaints about the place. My mother went there too, funnily enough.