André, you must truly have a 'greenfinger'
/ green thumb or something along those lines, to get plants like that popping up in your lawn.
We have managed to kill off wild poppies in our soil flower-bed without much effort, to never appear again, let alone have anything growing in our lawn.
Either that or you've got exceptional germination capabilities in your soil.
Laurie.
P.S. George!!!!!!! You've got me all excited now - what's your NEW camera, pray tell all. Can't wait to see your new piccies