Stewart Robert Hinsley writes
The number of stamens is wrong for a Lysimachia (compare creeping jenny
and yellow pimpernel) as well.

And the leaves look too fleshy. It may be me misreading the pic, but the
leaves seem to be of similar fleshiness to ivy-leaved toadflax - is that
impression right? - it's certainly more the fleshiness that you'd
associate with some of the saxifrages.
--
Kay