Another weed?

If this has brown, wirey roots then I think it may be a type of sorrel. It is a weed and all you can do is to keep weeding it out.

If it's sorrel, can't you eat it? I think it's used a lot in France. If you get a positive i.d you may be pleased to have it :-) On the other hand, I know nothing so don't poison yourself;-( I'll swap you for my celandine whatever it is :-))

Common Sorrel is a perennial clump forming so can be removed easily.
Sheeps Sorrel will spread over large area use Glyphosate to eradicate if in lawn look for specific weed killer.

It's Sheep's Sorrel, trust me! You only use Common sorrel for eating, not this one.

Thanks everyone. Where do these things come from, it wasn't here last year - birds maybe?