South coast flowering of White Stonecrop

At least my British Wildflower book seems to give it that name.
A very pretty pale pink flower which is actually very tiny, probably only about 2-3mm across.
I am ashamed to say that when I walk the south coast cliffs, this was between Petit Port and Moulin Huet, I see countless different flowers which I am unable to name.
Need to work on it as grandchildren will always ask details of the one you don't know.
Fun to take a photo and identify it later together at home.