He ended up in England , where he lived in Northumberland , working for a time as a teenage optician .
When the Nazis invaded , the family fled , Singer leaving on a children 's transport train with other Jewish children .
family ended up in England , where family lived in Northumberland , working for a time as a teenage optician .
When the Nazis invaded , the family fled , Singer leaving on a children 's transport train with other Jewish children .