No. One & One was most certainly written by Robert Miles, it's his song.
Some sources (notably Wikipedia) claim that the song was originally written for Edyta Górniakpart by Robert Miles.
First release was April 1, 1996 with vocals by English singer Maria Nayler .
Edyta Górniakpart included the song on her second album, Edyta. First release in Japan, November 7, 1997.