Hi Everyone,
I had a search through all Quorndon 1841 and 1851 census's as fully indexed on
http://www.quornmuseum.com/index.php (thanks Diddy) and the only Watts family listed at all is the that of Pharoah Watts and his mother and grandparents (one household). Also I trawled through all the 1841 and 1851 returns for Quorndon district on A** and the same result.
So it could be he was using another name (John) in these years, or could he be in prison (are these not covered by the same census?) or just away or avoiding the census!
On the possible use of an alternative name I am sort of hoping that his baptismal record (if found) will show John Cleopas or Cleopas John Watts

But that's just my wishful thinking again!!!
Cleopas or Cleophas (although often mistranscribed) is such an unusual name, surely we would have found him if he was out there in 1841 or 1851?
Thanks again everyone for your interest and help
Gerard