L&H (Lernout and Hauspie) Michael is one of the TTS voices available in Windows XP.
He speaks in an English accent, and thus, categorized as "Adult Male, British English #1" in Speakonia. TTS videos credited him with that name. He's not so popular when compared to Sam.
There is a large percentage chances that a British character on a TTS video will be voiced by him. His female counterpart is L&H Michelle.