I have actually just rewritten the files as before and provisioned the same server - ( I am assuming you can do that over a failed install) and it seems to have gone straight through with no issues.
I am assuming from that there might have been a space somewhere or something on the config files but all seems good.
I am also assuming that the 404 error not found page on Nginx at the address is because I have not deployed yet, because i would have expected to see the wordpress installation page?