Hi. Can Anyone help? I have this:

weedweed1

growing in abundance in my garden and I can't seem to kill it. It seems to spread by an underground root network and is dotted all across my lawn. Before we put the lawn down 3 years ago it covered the whole mud patch.

Weed & feed type killers seem to shrivel it up a bit, but so far I've just had to keep mowing the lawn to keep it short as poss.

If anyone can tell me how I can eradicate it, without pulling up my whole garden (perferably) then I would be extremely grateful!

Thank you

x