Well, it's yours to do with as you wish, but I do enjoy sitting with my cup of tea at 6.30 every morning watching Pied Wagtails foraging for their breakfast in my lawn, I'm not sure they'd enjoy the "prison exercise yard" look quite as much.Concrete over yer lawn- bosh! I’ve just redesigned/redeveloped our garden. Mower went in the skip hammer throw style. Felt good watching the parabola flight path and huge crash as it landed. Gertcha!!