Looks like it dates from the Flanders Campaign of 1793 to 1795 https://www.itv.com/news/2021-02-19/mass-grave-of-81-british-soldiers-uncovered-200-years-after-their-deaths-in-netherlands
Michael LintSep 18, 2020 General Saint Hiliare's 4th Division Casualties April 19, 1809LikeReactions02 comments2Views
Stephen PrenticeJun 24, 2022Dutch/Belgian carabinier horse furniture 1815LikeReactions012 comments12Views
Almost certainly the brief winter campaign of 1794-95.
Let's hope they receive the burial they deserve.