Can anyone identify this seedling?

leila.naghashi

Hi everyone, I wonder if you can help. I have these seedlings popping up mainly in my lawn and some in the beds. Does anyone know what it is? We put down a lot of grass seed in the autumn so not sure if it’s something from that mix that has then blown around? Huge thanks in advance.

leila.naghashi

Asarum

Sycamore.  There must be a mature tree nearby and I'm afraid you will be plagued by them.  Make sure you get rid of the ones growing in awkward places early as they are very difficult to get out after a few years.