We've been away since Monday, and got back this afternoon to find relatively large grey patches on the lawn: Those are probably the worst areas but there are bits of it all over the lawn, and even in the healthy bits I can see grey dead/dying stems. Any ideas as to what could be the cause? And, more importantly, what I can do to alleviate it?! All seemed well when we left, by all accounts it's been average here weather-wise this week (some rain, some sun), so I'm baffled. Brief lawn history - I laid it last March (2017), and it seemed to take well. Resumed mowing two weeks ago, it had it's second mow of the year on Sunday just gone, followed by Aftercut All-in-One. At the same time I also spread some compost and grass seed in a couple of places where things had got muddy and thin over the winter. We then left on Monday, and our upstairs neighbour has been out twice a day on chicken-sitting duties, but the garden has been otherwise untouched until we got back today.