I live in the South of Wales but I googled this and it looks good, 4 miles away from the National Park and it looks like a hearty pub with traditional features. Here are some reviews and photos, Hope this helps and good luck on Saturday, it doesn't say that it shows the game but in Wales it is hard to find a place that wouldn't show it.
Good luck on that one. I'll be in the millennium stadium. Come on Wales time to end this drought and beat the Springboks.