Pond Plant ID's please

[widiot]

Hi,Im yet another poster with a new wildlife pond in my garden.It was filled about a month ago and since then Ive been awaiting it to come to life.So far got a few small water beetles,water fleas,snails,and a few other small invertebrates. I have been allowed to grap a few plants from estabished natural ponds on a nearby farm.The thing im worried about is if i bring any undesirable invasive or non native plants and pop them in,so have uploaded a few photos for someone to ID.Im pretty hopeless on water vegetation and any help would be appreciated

This stuff grows to about 8 inches high,no idea if it flowers or not



This is the one im most concerned about,grows on long stems up to a metre long,lots of leaves all along the stems,thrives above and below the water.



these are about 1 inch across and seem to be doing well


So if someone could ID any of them,and advise whether they are suitable or if Im going to regret it later Id be most grateful