Pretty spring flowers volunteering in the garden

A bit of an emergency blip as I've been centred on home doing. some tests for a small photography project for some friends. On the way out to the cabin which has become a studio for a few days, I spotted these little flowers at the base of a large pot with tall tulips rather overshadowing them.

I don't know what they are. I bought them a couple of years ago and they have managed to survive against the odds. I rather like them.