Unfortunately, I am now getting
Internal Server Error
The server encountered an internal error or
misconfiguration and was unable to complete
your request
I seem to be replying to my own posts an awful lot - my apologies.
I have untarred ledger-smb-1.1.12.tar.gz over the top of the SQL-Ledger directory again - and I can log in correctly. I am about to check the state of migration in more detail, but it looks like it has been successful.
Thanks very much for the help.
Best regards
Rob