Interesting debate this one.
In the context of the club, does it represent the Trinity part or the Wakefield part?
I guess it depends on when it was first used. I think the club was the Holy Trinity Club when it was first formed in 1873, but when did it change and when did it use the fleurs-de-lys?.
Sohttps://www.ngw.nl/heraldrywiki/index.php?title
rlhttps://www.heraldica.org/topics/fdl.htmrl
What is clear is that the mainly blue borough crest was replaced by a mainly black and amber one for the district in 1990. It says it's black (for coal) and gold, but it's quite clearly amber. Wonder why that is then?