Very interesting stuff. I've always been intrigued with the Titanic sinking but I've never heard this. Best I heard was that there had been a fire burning in the coal storage since before they left port, which wasn't uncommon, but it was so intense that it had not only weakened the ships hull but it had also warped it. But the Titanic was switched with the Olympic? Incredible, especially the pictures of the actual ship laying at the bottom of the Atlantic.
But check out what we see here in America when we click on your last link... that's pretty interesting too. Looks like someone has something to hide...