Conversation:

In Welsh the letters ll, th, ch are classed as one letter, not two.
Llanfair PG therefore only has 52 letters.
'll' is said by sticking your tounge to the top of your mouth and blowing out.
'th' is said as in "Ruth".
'ch' is said as if you were clearing phlegm out of your throat!

Thank you for the pronounciations - I was looking at the name and thinking, " how the hell do you say that?? "

I really appreciate your pronunciation leads on the word. It is breathtaking the idea of just read it to my students at the lab.
I agree with the pioneering idea of finding a commercial and attractive name for the town. And lexically the term is very rich in meaning.
Helps the Welsh be known outside the British isles.

How right you are.

I raised this with the Guinness Book of Records in 1973 and they took the point. The story is at http://www.photopol.com/gbr/gbr.html.

If you enjoyed that you might also like to pay a visit to this piece of fouled up promo: http://www.photopol.com/signs/bta_cymru.html.