Brother was considerate and sent me up to date instructions. They were clear and easy to follow.
All was going well until I got the following on the terminal.
Setting up brscan-skey (0.3.2-0) ...
apt-get install libusb-0.1-4
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
brscan-skey : Depends: libsane (>= 1.0.11-3) but it is not installable
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).
root@daniel-N68SA-M2S:/home/daniel/Downloads#

I can now print but the scanner is not detected. It once worked, so it should work again.
As usual thanks in advance