On Feb 11, 12:52*pm, wrote:
On 11 Feb, 12:14, David in Normandy wrote: *says...
Was the ground properly firmed down initially before the
seed was sowed?

I'm not sure, to be honest. I guess I can get the guys who did it back
in and ask them.

It can take a little while for the new soil to form more of a single
entity. My new lawn would be soft in wet weather but now that's it's
been down for a year or so it's firmed up and the drainage has
actually improved. ...but yours sounds like maybe it wasn't compacted
enough from the start.