As I already explained, twice, in our earlier discussion, the problem is that your locale configuration is pointing to a nonexistent locale.

Your environment including $LANG is okay; however, the en_GB.UTF-8 locale must be generated.

On most distributions (including Debian):

1. Open /etc/locale.gen in a text editor.
2. Uncomment the en_GB.UTF-8 line by removing the leading #.
3. Run locale-gen as root.

On Debian:

1. Run dpkg-reconfigure locales as root.
2. Scroll down to the "en_GB.UTF-8" entry, mark it with Space.
3. Select OK with Tab, Enter.

Also, for the record, ls is a separate program; it is not part of bash.

As I already explained, twice, in our earlier discussion, the problem is that your locale configuration is pointing to a nonexistent locale.

Your environment including $LANG is okay; however, the en_GB.UTF-8 locale must be generated.

On most distributions (including Debian):

1. Open /etc/locale.gen in a text editor.
2. Uncomment the en_GB.UTF-8 line by removing the leading #.
3. Run locale-gen as root.

On Debian:

1. Run dpkg-reconfigure locales as root.
2. Scroll down to the "en_GB.UTF-8" entry, mark it with Space.
3. Select OK with Tab, Enter.

Also, for the record, ls is a separate program; it is not part of bash.