[pcrh]

That's only available to those with an undergraduate degree from Cambridge who, subsequent to their undergraduate degree, publish work worthy of a Ph.D. and pass a viva.

I'm not sure how common a route ot Ph.D. it is (I never heard of it before), but it sounds like an anachronistic extension of the MA's Oxbridge graduates feel entitled to.

[pclmulqdq]

Correct. It is generally an exceptionally rare path to a PhD, but the door is open. I believe I saw the statement that this particular program has granted ~100 degrees over its life compared to ~15000 PhDs from Cambridge.