Lawn Problem....

[janzman]

....Over the past month or so my lawn has changed. From being perfectly normal in appearance there are now areas where the actual blades of grass are about 2-3 mm wide.

Can anyone explain this and what I can do about it.

[woofgang]

The fine bladed grasses are being suppressed by broader bladed grasses.

[bookbinder]

https://www.gardenguides.com/97243-rid-wide-blade-grass-lawn.html

[Chipchopper]

Sounds like some broad leaved meadow grasses have moved in. If its in patches, you could always dig out the areas affected and returf the areas with a finer turf or sow a fine lawn seed which does not include rye grass.
Keep well watered until its established.

[janzman]

Thanks for the link and your tips