How to get rid of this campanula weed?

Hi Beebop, This is a little wild violet which is quite a persistent weed. it likes shaded fertile damp places and needs to be dug out. perhaps, now that you know what it is you could find ways of getting rid of it. Sorry I can't be of more help.

normal lawn feed and weed will sort out your viloets. they sow their own seed quite far as the seed heads 'explode' and throw seed about 3-6ft away. They are pretty but can take over an area. thats happened in my woodland bit.

Oh crumbs i've got these this year after thinking oh they're pretty now i'm not so sure LOL, will have to keep an eye on them from now on, thanks for the warning!!

I think they are lovely, you could water your lawn with weed and feed, that usually keeps all sorts of weeds at bay even dandelions. For persistant ones, dig them up and re-sow or place a square of turf there

Sewingkilla - they will spread like wildfire if you aren't careful... both seeds and runners

Sorry to say nothing much more than hard work, pick out every bit you can find , and treat your lawn with weed and feed every 3 weeks for the next 9 weeks. if you find it growing elsewhere try using a weed flame gun to burn them out. if you are lucky it will be gone by this time next year.

I wiould like to add them to my lawn. I have Cowslips and Veronica which I deliberately introduced to make some interest in this big stretch on all one thing. I also have a flowering Sedge in my lawn which I am about to post a picture.