After I posted that, I found this map [0] to try to figure that out. Still not sure, exactly. Would it have been on the Anglo-Brabant Landmass, or the Pennine?
Pennine is further north (modern Derbyshire/Peak District [1]), so unlikely there. The Anglo-Brabant Landmass is the most likely location as it juts into the eastern Cotswold region (Oxfordshire).
[1] Source: me. Born and raised in the foothills of the Pennines in Derbyshire :)
I mean, clearly it was above sea level, right?
[0] https://www.researchgate.net/figure/Generalised-Mid-Jurassic...