Thanks chaps.
I found the apk from that link a little earlier and have downloaded it, allowed installs from unknown locations and everything was looking positive - then I get a 'do you want to install this app'... and the install button does bog all. It doesn't seem clickable (or tapable).
:C
So, is that symptomatic of the app not being able to be installed 'cos of reasons known only to Lego and what all sidelined apps do if they can't be installed, or is my tablet having a fit?
Edit - scrap that, I had a night mode filter in place that was stopping me clicking the install button.
(fail)
It's installed, and the app opens up, then promptly closes itself down. Hmm, back to Lego support to see what they suggest.
Thanks for the help though everyone.
:)
EDITED: 8 Nov 2017 22:01 by GRAPHITONE