Mystery plant

Hi all
Help please in identifying this.....several have become apparent in my garden. The bracts of leaves tend to lie fairly flat and the root is massive...like a parsnip! Are they weeds? Need to be sure before I break my back digging them out.
Thank you!

 

Does look very Parsnipy

 

Hi There! Where are these in your garden? They definitely look like an umbellifer - so could be parsnips. These sort of things are very fashionable at the mo.