Lee Carré
Couldn't find or see anything resembling a manual rain gauge on the northern side of the water (where the note marker is). Neither from the wetland (western) side nor the road (eastern) side.

Signage indicates that this is a Jersey Water site (with access=private). So, couldn't go romping / exploring.

There are a couple of structures (including a small building) on the southern side of the water. Is this what was meant?

The whole site could do with a resurvey; there are missing footpaths, and other features.

Could the OP give more detail / specifics?