Could anyone identify this plant for me please. However much I dig it up, it is spreading around my garden. Thanks.
Looks like wild garlic?
What does it smell like?
It doesn't smell of garlic, but the flower is fragrant.
Can we see more of how it is growing please? The whole plant
Possibly polianthes tuberosa, but the flowers don't look quite right and it might be a bit early unless you are somewhere warmer than most of the UK. As Dove says, a better photo of the whole plant might help.
Edit: just read the bit about spreading, so it's not that as they are tricky to grow.
It looks like Allium siculum (syn Nectaroscordum siculum). There are two forms of this, a large tall plant which is reasonably well behaved and a smaller version which is an absolute thug.
I know the big one and the flowers do look similar, but that's quite tall isn't it - I seem to remember 3ft ish - that's why I asked to see the whole plant - to get an idea of scale.
It looks a bit like nectaroscordum but I don't think it grows all that vigorously!
Does it have squarish, brittle stems, if so it could be greater stitchwort.