Could these be the geraniums I sowed just over 1 month ago? I sowed 5 seeds in a pot which I left outdoors. It's an old (possibly heirloom?) creeping variety that we used to have growing in the back garden of our old house. It died back at the end of the year, and returned the following year, presumably by seeding itself, but I'm not 100% sure.
The last two photos are the only photos I could find of the fully grown plant, but I know I have some that show the plants better somewhere...
I don't suppose anyone has an idea what variety it is. It was originally acquired from Kent by my mother, and I've not been able to find any geranium quite like it despite a few hours spent searching on the interweb.
