Thanks for your reply Daisy,
I haven't seen them flower yet, but I haven't been around either tree for a whole year.
The leaves have no odour when crushed.
I couldn't see any buds/flowers/pods on the tree, but I found some old receptacles? underneath the tree (pictured, but which I cannot guarantee is from the same tree, but is likely to be).
Also the leaves have started to turn orange? (pictured) Isn't early January a bit early for Autumn leaves? Although we have had a heatwave lately, perhaps this could've had an impact...?