Yes, geeka my statement does need to be considered carefully. In comparison with the best systems in western Europe, there will be variations. But my point was a global one -- if you look at UK universities in the light of say, what's available in the US (and I've taught there) then there's a different picture.
The thing is, that UK universities are all subject to national standards and the inspection/maintenance of those standards externally & internally. THings like: the External Examiner system, second marking (not something they do in the US, Australia, Canada, periodic quality reviews logged with the QAA, the national research evaluation exercise, the new systems for allocating PhD scholarships & funding, and so on.
As academics we might complain about all these systems, but they do mean that we can say that UK universities are amongst the best in the world.
Would any potential applicant to an EU or US or other world university know where to start to check these things? I think the NSS is a completely rubbish survey (my statistics training from 25 years ago, as outdated as it is, tells me that!) but it does give a national measure for comparison. And so on ...
At least, these are the things I tell myself when I'm suffering through yet another 'governance & quality assurance' briefing