Why not they serve a purpose whilst I like my BS poly nucs and I have a few the price of all poly has risen considerably. You can probably knock up 2-3 wooden nucs for the same money, so appreciating your further North than me if beeks ensure that the nucs are well stocked with bees and stores they will winter well.I won't have timber nucs full stop.
PH
Those trays are really uesful for lots of things ... Stewarts usually do a spring promotion at two for £13 ... watch out for them and buy them when you can.
Yes there good for stacking boxes with honey and they make good temporary roofs! My local garden centre normal has them at 2 for £14, if any see them cheaper let me know!