So glad to see an active forum on this topic. I have emailed Find My Past with a question but await an answer.
I had such high hopes to answer some questions - but to no avail. I have my grandfather and his German wife, both born before 1914, yet they don't appear on the register. They had three children at that time, so I find it odd they risked not having a ration card.
Would family of registered aliens (if indeed she was registered) appear on a different list?
Names are George Henry Moore & Senta Moore expected to find them in either Kingston upon Hull or Ripon or Harrogate.
(For those who have found bits of streets missing: I have found that if you use the references for those bit of the streets that do appear, and just search on the reference, you will found how parts of streets are often indexed differently)
During WW1, married women were understood by the British gov't to have a primary loyalty to their husbands. Thus, if a British woman married a German, she acquired his status as an alien. "Love, honour, and obey."
Most of the Germans in Britain at that time were either men, or women married to Germans. German women married to Brits were not common and I'm not sure how their status was defined, but it would seem, logically, that they would have been seen as non-threatening because they were deemed to be under the influence of their husbands.
I'm not sure how this worked out in WW2, but it is some background info.