Just to add - so Marnie/ Mamie would have been 15 / 16 when she had Ivor ?am I right if she was 19 in next census - also- here is another mis spelling - she is down as Marrise and again her son is listed as Ivan ....
https://familysearch.org/pal:/MM9.1.1/JQSX-YFS
poor girl must have gone through most of her life with people getting her name wrong
added...can anyone explain the different codes on Familysearch where it says
System Origin - this one says England EASy
remember seeing ODM or OMD ??... WHAT`S THE DIFFERENCE PLEASE ?...baffles me