Flowers in the rain

I'll get the obligatory YouTube link out of the way for starters....if I've got this stuck in my head for the day I might as well inflict it on Blipland too, share and share alike I say!

So.....I think it's maybe a damp Clematis, it only has 4 flowers but it's starting to put up a fight for space on the trellis with the brambles. Don't know where it came from, it just appeared last year, but it was a sight for sore eyes (and a blank blip brain) this morning!