According to information at workhouses.org there was a new workhouse opened for Bishop's Stortford Union in 1837 at Haymeads Lane, Hockerill, Bishops Stortford. This Union included the parish of Little Hadham.
Since the newspaper article referred to Bishop's Stortford Petty Sessions I am assuming it will be this workhouse, but there were pre-1837 workhouses, so these may still have been operating (see workhouses.org for details of these).
For 1841 you can find this establishment either by browsing to county = Hertfordshire, parish = Bishop's Stortford whereupon you will see the workhouse has its own enumeration district; or by searching folio 48; piece 434; book 3; page 1.
The record has six pages. I have looked through and I can see no-one called Watts, but you should check too.
Added: side-by-side map view of the new workhouse here:
https://tinyurl.com/ycfya88vThe layout seems to be preserved in the modern map.