Hi Mick, I always fish thru' the winter as there are some very mild days that allow you to get out and wet a line.
With the water getting colder and insect life being scarce the fish start a bit of Fry Bashing and this is when the lure type patterns come into play. There is no particular pattern that is a sure thing, just experiment with your fly's and fish at various depths until you contact fish, gauge your depths by counting down, vary the speed of your retrieves and fan cast to cover as much water as possible.
Buzzers fish the whole year thru' so carry a few patterns in your box, and to complicate matters a bit more, it is not unusual to catch a fish or two on top of the water.
If you intend fishing the winter months, check that the fishery is open as some close for a while as the owners need a break and some of the smaller waters ice over.
Maybe long winded Mick but I hope this helps.
Seddo