British Royal Air Force Powder Blue Classic Working Dress Shirt. 

Size 41 . ISSUED and USED but in VGC. Long tail.  

Lightweight and has Corporal Slide on Epaulette Rank Slides.

Machine washable (40 deg.).

Although used, the shirt is still very wearable and has Epaulettes.    

Good for Service Use / History / Re-enactment / Collector.