I believe she was actually new to Denbigh Corporation way back in 1898, registered to them in the 1921 with the 'new' licencing, passing to Denbishire County Council as fleet No 33 at some point.
I'm not sure when, most of Denbighsire County Council rollers were won in 1929/30 when the RDC's were abolished, but Denbighshire Corp was not an RDC
I also believe she was with an owner called Gray in Notts after Haywards.
I have Fowler 15489 CA 6327, Ex Wrexham RDC and Denbighshire CC (Fleet No 120), and grew up in Ruthin, hence the interest in Denbighshire rollers