Looks like Wild Garlic. It will smell garlicky if it is.

Agree that is what it looks like :-)

And dig it out immediately if you don't want it all over your garden.

certainly looks like an allium but not sure as to which one but its a bit early for what I know as wild garlic [ramsons in our area]

There are masses of wild garlic in Exeter. As you are in Kent, i expect it's similar AD44. Pretty warm for March.

Thanks everyone. It wasn't in my garden, it was growing at the front of someone else's house and I thought it was quite pretty. I forgot to smell it, shame it's a weed though!

Allium triquetrum, very invasive, but yummy - I have it in my front garden and my kids and their friends snack on it as they go past!

Only a weed if you don't want it in your garden. It does spread around like mad if you let it but I manage to keep it under control and I love it. Great for cooking too.