Maybe I missed something in this programme but at no point did I hear evidence for the holes being used for posts. Also I did miss the radio carbon dating due to one of my moggies coming in with a freshly killed rat (the body was still warm - ugh).
One advantage of living in Wales though is that it will be repeated on S4C - probably at 2am on a Thursday morning.
Something is not right. This message is just to keep things from messing up down the road