my personal sense is that its best to keep some healthy skepticism on this one......strange coincidence-- I just read this article 3 days ago....
http://www.redicecreations.com/article.php?id=584
..."Regarding the television interruptions, Lynn Picknett and Clive Prince write in The Stargate Conspiracy that, "as usual, there were only two options considered: either the whole thing was genuine and extraterrestrials had really spoken to the southern English through their television sets; or it was hoax, just done for a laugh. The idea that such a message could be easily contrived by, for example, an intelligence agency that would have the necessary technical skills has never, to our knowledge, even been considered.""...
note: RedIce says the speaker called himself "Grahama" and said it happened on the 22nd, not the 26th (possibly simple mistakes or is this a totally different event?)