A Mystery

Ok, last one for today and bit of a mystery. Low mats of small white flowers and fleshy leaves flowering in April. Another coastal one that literally grows on the volcanic rock with very little in the way of soil. Will take direct salt spray and sandblasting!

I can't find a reference so does anyone know what it is?

 

It looks like..one of the mouse ear plants ..from the family caryophyllaceae...their is an alpine one and a little mouse ear..its really hard to say for definate as i cant see the leaves very well..their is a wildflower online check where you fill in forms on what shape the leaf is etc..and they give you some options..but i think its what i say as i have double checked it in my botany book..