Well can you believe it? I've just weedkiller-ed loads of this plant on my allotment only to find its edible. I have no idea where it came from - it wasn't there last year
I'm wondering if its used as a green manure as a neighbour said he might put some on my plot but I've not seen him since.
If you have a pink flowered weed that looks like a stinging netttle with small leaves check its not this first:
Lamium purpureum - Wikipedia, the free encyclopedia