Posted: 18/08/2013 at 13:43
Interesting story Antony. Welcome. Congrats on the twins.
Now you have your grass at reasonable height try to cut it regularly . Is it big area? Often it is just as quick to cut whole lawn as it is to cut just a part of it.
I think those "flies" just enjoyed nesting in your lomg grass, enjoying the moisture and cover. After a couple of mowings I think they will disappear. Wear boots but keep on top of the mowing. It will be a great area for your twins to play on next year