maybe unconnected but seems an unusual name. I have a pocket watch hallmarked 1807 and the watch movement is signed INo.(Inigo?) Fleurriet LondonAs Ancestry.co has so few Fleurriets its possibly connected. A lot of watchmaking seemed to be centred around Eastcheap/Leadenhall Street, not far from SpitalfieldsI recall seeing the name in a book of watchmaking but can't now find a reference to it on the internet.best wishes.
I checked both volumes of Watchmakers and Clockmakers of the World without success