Dafydd Iwan "descended from Welsh kings who ruled England" said the headline in the Daily Post, which seems all to typical of the high falutin' claims that usually ensue when DNA meets MSM.
This was all publicity of course for an upcoming project, backed by S4C, the Post and the Western Mail:
Other celebrities will be tested including Kath and Bryn and also members of the general public who will have paid up to £200 for the privilege - I'm guessing the celebs will get a freebie. So what we have here will be a self-selecting sample and a good deal of what the project may well tell us we already know. South Wales is full of folk with ancestors from Ireland, the West of England and further afield for example.
Mind you even more rigorous sampling gets things wrong, remember the Blood of the Vikings series which picked out Llanidloes as a likely place to find Welsh DNA. Of course the town is slap bang in the middle of the 16C Arwystli plantation, typified by surnames such as Wigley, Ashton, Chapman, Jarman, Peate etc. You could end up with Y-chromosome results more typical of Derbyshire and Lancashire than Montgomeryshire.
Of course a large sample of Welsh DNA is to be welcomed and hopefully that is what the project will achieve. It could find out more about the supposed Balkan hotspot around Abergele or the hinted "Pictish" DNA in Central Wales or who knows what else.
A large pinch of salt however, conclusions in this branch of science are open to frequent revision. Time was there was no Neanderthal blood in modern humans, then there was, then there wasn't, now there is. Same goes for the out-of-Africa theory.
Meanwhile things could get a bit bothersome for S4C as a result of the controversy between the scientists behind the project and those at UCL. It's already been the subject of an editorial in the magazine Nature and UCL have dedicated a section of their website to the matter. Scroll down on this page to 24 September 2014 for a taster.
Anyone interested in joining the project can do so here. Hopefully they'll get involved in the hope of uncovering something about the prehistory and unrecorded history of Wales and the Welsh people rather than just to bore the pants off us all with daft claims of being descended from Svein the Viking.