Very Unusual WW2 Possible Airborne Related British Maternity Style Tunic Produced for Extreme Cold W

Very Unusual WW2 Possible Airborne Related British Maternity Style Tunic Produced for Extreme Cold Weather, produced in a fine khaki cloth with a large collar having press down snaps. The front with a half zip and button fastener. Two large hip pockets and two breast zip slash pockets. Fixed waistbelt. Interior with a very heavy padded lining. Collar with Gieves label with inked name, but this is not clear. Sadly the tunic has some heavy moth damage. Lieutenant-General Sir Frederick Arthur Montague "Boy" Browning, GCVO, KBE, CB, DSO designed a special pattern of Maternity tunic to wear, which is housed in the Airborne Air Assault Museum, it is possible that this tunic was designed to be worn by the Airborne forces or Glider troops in Norway.