Currently up for auction on eBay is this 1943-dated battledress blouse. This austerity pattern with the exposed buttons isn't as rare as the seller believes but it appears to be in mint condition and to be in a reasonable size. My experience with the labels on most battledress is that they often different to the figures stated. I've got two with vastly different size labels that fir me perfectly...
News about interesting insignia, ARP related info and period photos that turn up.