Gilly, thank you.
The chaps who installed our grass made a thorough job of digging out the site. Then there were about three layers of different materials put down, plus a permeable membrane, before the actual grass was laid.
When we had ‘real’ grass, there was a patch where it always had a big puddle after heavy rain, but not now. The drainage seems to be working well.
I remember many years ago, DH and one of our boys, trying to dig a soak away, but as we are on very heavy clay, they didn’t manage to get very deep down.
As DH was 80, a couple of weeks ago, I think he has earned a rest from mowing, edging and general tidying. ( I am not that far behind him
! But, we do still potter about, when the mood takes us.