I had to download drivers from the Brother site to get the printer to show
up in CUPS but then it did so three times! After a bit of trial and error,
one worked fine. However after a few weeks, regardless of settings, prints
came out at the bottom of A4 sheets in portrait, even though landscape had
been set. Whatever positioning had been set in gimp, failed to reproduce.

Re-selecting another of the three CUPS offerings would get it to work for a
bit and then it would stop again. Printing from a VMware Windows client is
fine.

I am undecided as to the next best step.