Thanks for your feedback. I marked it not as a weir, as water doesn't "spill over the top", which in my view is a key point that defines a weir. But truth be told, I have not looked closely at how water leaves the pond. But walking along that side of the pond it feels more like a fixed barrier or dam, with it's balustrades. But below the bridge there could be "spill over" that I have not looked at / noticed.

If you say there is, I am happy to relabel it to a weir again.

Let me know your thoughts. 