A Channel 4 News' weatherman pronounces the longest place name in Wales, Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch - and he does it perfectly. Cardiff born Liam Dutton pronounced the longest place name in Wales during his live weather broadcast on Channel 4 News. This might not seem like a big deal, unless you know that the longest place name in wales is Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch - yep that's a mouthful. Mr Dutton didn't shy away from saying the place in a broadcast and after watching the video you'll see why.