"There is an eloquent piece on Dorothy on the Feltwell Village website that I would urge you to read. What I will just take from that is this section:-

She was at first sent to Northampton then to Reading, after that to Anglesey where she was trained as a nightfinder on a gunsite. The gunsites were manned by four girls and a man who fired the gun. From there she was given some leave, it was three months since she had left home and she assured my parents that she liked army life. Her unit 511 HAA Battery RA. were then moved to Ashby-de-la-Zouche -near Manchester, where they were no longer in training but in action defending the area against enemy bombing raids. 

In June she was granted another seven days leave, just before her eighteenth birthday. She seemed quieter this time and said very little about what it was like. On her return they moved again this time to the small village of Preston a few miles from Hull.

Hull was at that time suffering severe bombing raids from Germany on a regular basis, especially at night, Hull docks being their prime target and when the air raid warning went the girls alongside the men had to be on duty and were exposed to exactly the same dangers as the men, their only protection a few sandbags and a tin hat.

August 1st 1942 was a beautiful summer day but before lunch on that day my parents had received a telegram from the War Office that read, "We regret to inform you that your daughter, 109181 Pte Dorothy Lemmon was killed in action in the early hours of this morning." There had been a severe air raid on Hull that night and Dorothy had been hit by shrapnel."

  [feltwell.net/feltwell2/times/aliferemebered.htm  Retrieved 3/5/22]