Cheers for the heads up @junkie_dolphin that mittan stuff is nice! Will add them to the long list of brand mirin'. Though as you said they are more full length that was what i was trying to layer under. I have the index jacket but its thin so can't wear as much in colder weather without hoodie but wanted a more unifom layer. Grabbed the Sir Plus one as there is a store very close to me so went in today.
Got the wool/cashmere blend one and its really nice quality. Has 4 inside pockets which was nice to find and the two outside hand pockets, good angle on those.