As a hangover from previous incarnations, the uploaded TTL included an owl:versionInfo statement.
The webUI reported an error on upload; complaining about the line with the owl:versionInfo statement (albeit a vague error that I can't remember the text of).
So I fixed the problem in the file (removed the owl:versionInfo statement) and tried to upload again.
In experimenting with methods to upload ontologies to the register I decided to look at using /-pattern URIs.
See http://ukgovld-registry.dnsalias.net/codes/bufr4/schema7
As a hangover from previous incarnations, the uploaded TTL included an owl:versionInfo statement.
The webUI reported an error on upload; complaining about the line with the owl:versionInfo statement (albeit a vague error that I can't remember the text of).
So I fixed the problem in the file (removed the owl:versionInfo statement) and tried to upload again.
This time the webUI reported the following error:
Clearly the previous upload had got partially complete to the point where I can't now load something in that space.
Seems like the registration process should ignore owl:versionInfo from the payload (& push a warning to the log?)