Hi, I scythed the Carex back from the old pond back yesterday and found a good crop of Utricularia - I think it is U. australis. Easy to grow in a garden pond (does not need to be acid) and iin warm conditions it will usually flower. Free or will swap for something else.
I also have pieces of Potamogeton alpinus, P. gramineus and P. x griffithii available. Very nice and different submerged plants for a pond, and non-invasive unlike most commercially available species.
PM me if interested.