Saved by a flower!

I was pulling up some weeds from one of our blackcurrant bushes, including these vetch that had invaded the bush: However, the tiny flowers on this vine were so lovely I left it in place.
Apparently these vetches  fix nitrogen into the soil so perhaps i should let them run a little wild.
Okay, I've just been and read Wikipedia and the plants are good for the soil and provide food for many insects. So next time I'll let them be. I'm informed by Wikipedia that;
"Vicia sepium or bush vetch is a species of flowering plant in the pea and bean family Fabaceae."