Because we are told that using weed killer ,(désherbant ) roundup etc is no longer allowed I have found a natural one that works .
1 ltr of strong white vinegar, add 3 tablespoons of salt and 3 tablespoons of cheap washing up liquid, spray it only on what you want to kill , and it acts immediately on dandelions and the related flat leaf dandelion plant . I found it really hope this works as well for you as it did for me !