Not sure that would have mattered for the reasons below.
You might want to take a look at the below:
https://www.postgresql.org/docs/9.5/static/wal.html
In particular:
https://www.postgresql.org/docs/9.5/static/wal-intro.html
Short version WAL files are essential to restoring and on the originating server are recycled, subject to the configuration parameters explained here:
https://www.postgresql.org/docs/9.5/static/wal-configuration.html
So the wal archiving you have set up is not storing everything, it removes older files over time?
Yes... it removes... I've changed to store them for up to 72h.
I'll restart the process now, by using stream instead fletch.
Let's see.... =\
