Gray, gray day: you will not win.
As an antidote to the unrelenting rain and murk, here are a couple of tiny beauties that I photographed earlier this week. Both were growing between lettuce plants as “weeds” in my cold frames.
Bird's-eye Speedwell, Veronica persica. So small that ten of these flowers would fit onto my thumb-nail.
Wikipedia says that this species has "no known horticultural uses." Unbidden beauty is utility enough for me.
Small-flowered bittercress, Cardamine parviflora.
Each flower is about as big as a grain of rice.
This is the first year that either of these species has shown up in the cold frames. Their seeds may have come with compost from other parts of the garden or as “extras” in packets of lettuce seeds.
David George Haskell 
watch out David. That little speedwell is an annual and it will take over your winter/spring garden if you let it go to seed. The flowers are beautiful -Miriam Keener
Hi Miriam, Thanks for the heads-up! I infer that you’ve had some interactions with the charming little speedwell…? I must say that the flowers totally captivate me — little sirens calling me onto the rocks of a weed-infested cold frame.