Water plant

Water plant

Observation - Water plant . Description: This plant has started growing in the fringes of a small pond after the water level increased recently. The leaves are about as big as a 1p piece and look like shamrock. Does anybody know what it is? Thanks

This plant has started growing in the fringes of a small pond after the water level increased recently.
The leaves are about as big as a 1p piece and look like shamrock. Does anybody know what it is?

Thanks