Pruning hedging

I wish to cut the growth on my Leylandi hedge. Is it now the wrong time of year as we now have frosts? I am concerned the frost will damage it and it will then go brown??
I also have some 2yr old mixed hedging plants(hazel,thorn,spindle,dogwood etc) that have grown well but now too high and straggly.Will they be damaged by frost if I cut back a bit now to tidy up?

 

Can't advise on the conifers but for the rest I have pruned shrubs when its been cold - though well after all the leaves have fallen. You may get a bit of die back in severe frost as you do with roses,but new growth should cover that.

or you can leave it for two weeks, when the Met. Office forecast a return to south westerlys after a week of cold winds and snow on high ground brrrr.

 

no problem.. this is traditional time of year for cutting back hedging