Welcome to Rootschat, Loppy!
Walter's death, and the births/baptisms* of all 3 children are available to order through the GRO, but as they are overseas records, they are paper copies only, so they would take several weeks to arrive, and it's a slightly different (but easy!) method of ordering.
If it is something that interests you, I can post the info you need to order them.
* Although they are listed as being birth records, sometimes they are baptisms. Often, there is very little info on them.