Zetec2
Recapping, the number in question was in a block "880000 to 897999 " for WAAF personnel inducted as of March 1939, If she had been commissioned she would have had her service in the ranks terminated and re-enlisted with a new (officer ) number? that's what happened with my father when he was commissioned, the London Gazette showed his new number 17xxxx not his airman's no 75xxxx issued on joining.