Not sure that a regular venue for national championships (as Prestatyn is) really qualifies as 'unrated' but very pleased to see the coverage. For the benefit of non-Brit readers of GCA, Prestatyn forms part of a quintet of Welsh courses (along with Ashburnham, Conwy (where the Curtis Cup is headed), Pyle and Kenfig, and Southerndown) that the Golfing Union of Wales regularly use for both men's match-play and mens' stroke-play championships: they also use Aberdovey (the permanent home of the Welsh Seniors' Championship, and the venue for the Welsh Amateur this year) and Tenby and Machynys from time-to-time. Porthcawl and Harlech also of course form a core part of this informal rota, but both are emphatically 'rated'. Pennard, interestingly, has never been part of this cohort, which may change with the new blue tees installed there, but as I have said before on GCA, the latter's reputation and appeal within the Principality can be a rather Marmite one.
Anyway, in writing this I am very conscious of stepping on to Mark Rowlinson's turf, and on the 20th anniversary of the publication of Golf Courses of North Wales by messrs Rowlinson and Lees, would only flag that Rhyl GC was (prior to World War II, and the sad loss of half of its land and holes) likewise once a regular Welsh championship venue.