Surrey,
United Kingdom 
I found this lilac geranium whilst walking in woods the foliage looks like the white small flowered wild form i think i have that self seeds everywhere in my garden or are they both cultivated forms that have escaped?
23 May, 2019
the pale lilac one is probably one of the natives, the leaf shape suggests G rotundifolium. there are some very pale forms so the white one could well be one of those.
it could also be G sylvaticum the wood cranesbill but the leaves don't look right for that.
23 May, 2019