Best way to cut PVCu trim

[numpty with a crowbar]

I'm about to start fitting PVCu internal trim round some of the windows - got the trim, but not sure of the best way to cut it so it looks nice and neat. I've got the usual array of hacksaws, jigsaw, stanley knife etc - what's likely to give me the best and cleanest cut?

Also assuming that no more nails will do the job for holding it on??

 

[crank39]

I ve always used these.....

http://www.machinemart.co.uk/shop/p...i-function-shear-set/path/knives-multitools-2

Good for angles, just google gasket shears to see if you can get them any cheaper, if not then machine mart it is, also you get a variety of fittings, but for trims use the bit with the angles marked on it, nice clean cut.

As for sticking the trims on then use ordinary silicone, white or clear, no nails drys hard and may not key to the trim