Hi Leah (and others who have also been interested in this topic),
This was such a coincidence to see this email on this topic, as I am also trying to find information on my cousin's mother (Esther Aronowicz) who arrived in the UK in March 1939 on a Domestic Sevice Permit. I have been to the website for World Jewish Relief and left details for them as they may be able to help.
Sincerely,
Ms Terry Ashton
Melbourne Australia

Searching: 

ARONOWICZ: Germany/Poland
PRASHKER: Kalisz,  Poland

SZUMOWSKI: Gorki, Zdunska Wola, Lomza,  Poland

WAJNGOT: Hungary/Poland

GOLDMAN: Blaszki, Poland

SEGAL/SEGALOVITCH: Vilnius, Lithuania

HOLTZ: Dvinsk, Russia (now Latvia)