Mystery alliums

Does any I one have any idea what these mystery alliums are?They appeared last year and are multiplying fast in my borders. I never plant any sort of allium in borders as don’t like the untidy leaves. I left them last year but they never flowered and seem to be multiplying by tiny bulbils attached to the main bulb. Bright white with a Distinct smell of onions/garlic but unlike any onion/shallot/garlic that I have at my allotment

 

Thank you but I don’t think so as never seen any flowers and would certainly have noticed these. The bulbs + tiny offsets they seem to spread from are brilliant white

 

I don't think they are Nectarsocordum I find these have a distinctive smell unlike an allium smell more like burnt rubber also leaves are very broad and flower stalk about 1m tall. Having said that I cannot say what you have.
Look up three cornered leek Allium triquetrum. Hopefully not that, but check.

 

Thank you for the suggestions - not 3 cornered allium- the best guess I have from my Lottie so far is perennial leeks! ‍♀️ Maybe I will thin them out and plant with more space to see if a leek develops!

 

There has never been ANY flowers