What plant is this?

[tentontruck]

Or rather is it a plant or a weed?

Looks like a geranium to me but I'm not an expert

I think it's a weed- buttercups?

I was thinking hardy geranium but I'm not convinced.

I would say geranium also.

dorsetperennials.co.uk/product/geranium-x-oxonianum-trevors-white/

Not necessarily this variety but I'm pretty sure it is a geranium. Our garden is full of it. Its definitely not a buttercup.

You are all brilliant, hardy geranium it is then, I won't dig it up! How about this one? Also a geranium?

herb robert - weed :)

herb robert - yes also geranium family i think.
its easy to pull up so keep it if you need to fill spaces then rip up when ready.

Thanks, I've dug it up as it was starting to squash another plant.