Posted: 16/09/2016 at 07:32
Don't use 4 in 1 at this time of year - you'll be setting up a load of new problems for yourself. It's for spring application.
Leave your lawn alone now, apart from mowing as needed and as Verdun says, on a Med height cut.
If we have a mild winter and it keeps growing, only mow on dry days, never when frost is forecast.
The real work will start in the spring.