Pearlwort ?

That would be my thought too

Thank you, I have bigger patches than this, would it be better to weed kill it?

Best of luck. I find that even the weed flame gun has no effect on it. However, Roundup does...........eventually.

I'm now on year 4 of hand picking (well, removing them with an old garden fork), these little blighters. Definately drastically reduced numbers now, and know that I've got to get them before they flower.
I didn't want to use weedkiller as many were too close to wanted plants.
I'm hoping that another year or two of being vigilant, and getting them early, will eradicate them completely. fingers crossed.

I think I shall just have to keep at them, it was the long winter that meant the gardening had to be delayed, but they kept growing. Thanks for your comments.

Keep at it Lizziebee! We regularly remove from the garden...