This is a photo of Mary Lock. She survived the Coventry Blitz of 14 November, 1940 and later joined the Fire Guard service becoming the only female instructor in the Coventry area. Her uniform features the special Fire Guard / CD breast badge for Coventry - based on the city's coat of arms of an elephant carrying a tower with the watchful cat on top. I cannot quite make out what her shoulder titles say - possibly starts with Fire Guard on the top (but there is no border to the badge which usually denotes the higher ranks). You can see her Instructor badge on the left pocket of her Pattern 71 tunic with a few service chevrons on her lower left sleeve. A remarkable lady.
Read about Mary Lock