Cheeky ID please

I have no idea if this is a 'wild flower'.  I was given and orchid as a present, it did not have any labels with it saying what it was. Well it started growing like a creeper and sending out long white runners, so I got a tallish branched twig from the garden for it to grow up -I don't know if this explains the plants that subsequently appeared in the pot. Maybe the twig had wildflower seeds attached it it. I could identify the Ivy-Leafed Toad Flax, but this extremely delicate, spindly plant with tiny wee white flowers has got be beaten. Had to use macro to get photo as the flower cluster in slightly smaller than a drawing pin head


plant in orchid pot by Helen Skelton, on Flickr


plant in orchid pot3 by Helen Skelton, on Flickr