Too impatient!! So I have installed bash.
Just dropped to root shell and did apt-get install bash3. edited /etc/passwd and changed /bin/sh to /bin/bash for user and root.

It is now starting up. I will have a play and report back in a bit.

First thing though, when you first configure the frontend, start it after you have changed to root as it wants to ping the backend to test connectivity, but user is not allowed access to ping by default, so it will never find the server.

Also on-screen pop-up keyboards do not work.