Help needed with new lawn pls

Dear All
I had new rolawn turf about 4 months ago. No problem until now. From the last few weeks patches start to appear and they are growing in number. Please advise what it is and how to solve the problem. Pls see attached 3 pics .
thanks
rkm

 

I am new to gardening but i know enough to confidently tell you they are worm casts.
I have the same problem. It is something that occurs around this time of year
There was a feature on it the other week on Gardeners world which will make you feel better about it. Not sure which episode but it was aroung the 9th oct if you have catch up

 

Yea Worm Casts. Nothing you can really do apart from wait for them to dry and brush them over (hard now the nights are drawing in and its wet).

I had them this year but they soon disappear when the grass grows back.