Could be turf thatch fungal mycelium, or turf ophiobolus patch - any chance of a photograph of the area?

Thanks - I'll take a photo tomorrow and post it here. Do you want just the lawn or also a photo of the earth with the white/ash-coloured bits in?

Both if possible!

Hi Bamboo,

Here's a picture of the earth and the area. The dark area at the top is where I am attempting to re-seed the grass.

Where's the picture? Its not here, nor in your Photos.