WW2 Westminster ARP Warden Portraits

Very interesting pair of portraits of a member of the Westminister ARP Service. I thought initially she was wearing the bluette overalls but the position of the ARP buttons looks to be two double rows - so I'm thinking the driver's coat. The ARP badge, Westminster area marking and medal ribbon are not usually shown worn on the drivers' coat. I'm unsure of the medal ribbon - they look like the trio for WW1. If anyone can identify those I would be very grateful. 

​Of interest she seems to be wearing a very similar shirt to that worn by Barbara Nixon.