Well, I love a freebie!

They looked dry and dead all through the winter, then produced some tall green leaves in spring, and flowered this month. A beautiful surprise! they are lovely!
I google-lensed my photograph of them and apparently they are 'Montbretia', which I'd never heard of.. The RHS informs me it 'can become a nuisance in some gardens if uncontrolled' - well, mine is planted in supermarket crates (my planters of choice these days!) - let's see if the bugger manages to escape from there!
The purple one is an aster and the yellow flowers are lovely dandelions I couldn't resist for their colour.