[shillelagh]

Washing up liquid kills the greenfly and blackfly. They use it on roses.

Best way to do it is dig it out. Its the only safe way because the kids are playing out on it. If you do put weed killer on it dont let the kids play on it for a couple of days. And dont put it on when rain is forecast - because the rain washes it away.

Dont use a spade - its easier using a fork!!!

There speaks the voice of experience - i had to dig out the front and found it was easier using a fork than the spade.