Thanks for the encouragement both. It does already taste like the best beer I've made, by some margin, but I think I can recognise the youth in the taste (as well as the condition) so I will be duly leaving it until Christmas now, and putting some away for longer, as ordered.
With a similar batch on the go too, there is a decent chance of some of the 100-odd total bottles lasting the course. Not sure when I'll get a brew day next, but something 1.040ish is now likely. I have some excellent Brewferm kriek, some reasonable Coopers stout and some Brewferm Abdij left to keep me going - not that they are quite in the same league (though the Kriek was a particularly great kit, I think).