You are missing some people, and for the life of me, I can't find a method to ADD to the records. Make the addition facility clearer.
Make the "Add a person" facility clearer. For the life of me, I can't find it, and I have a person and records to add. i.e. Francis Albert Williams DCM. Number 4240 of the Royal Garrison Artillery.
Mary Barker commented
Agreed, I found it not too clear to be able to "Add a person"
If you do a search for "4240 artillery" you will find 3 separate records for him. Sometimes using less information to start the search is more successful.