https://www.google.com/search?q=English+Austin+Cambridge+A-55+MK+II+1959&client=firefox-b-1-d&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjvq6iI5fXtAhV3Ap0JHfhpDWYQ_AUoAXoECBMQAw&biw=1260&bih=853#imgrc=7r__kG-hqQnWhM
Thanks for finding— amongst the photos (and looking up in my papers-it was the earlier “rounded” body model, so a MK I), found the one I had— paint job was light gray.
Here: https://commons.wikimedia.org/wiki/File:Austin_A55_Cambridge_with_non-originakl_wheels_1489cc_first_registered_January_1959.JPG