Thanks for prompt responses - apologies, I should have stated that I had already run the apt commands but it came back saying no packages to be updated.
Has the 2019-09 actually completed on my machine without my realising or might I be doing something wrong around the apt?
Can't pull screenshot at the moment but basically tried both sudo apt and sudo apt-get variants and got back no packages to be updated.
As before, TIA.
Edit: jumped on another machine and pulled the following --
pi@rpi-1:~ $ sudo apt update
Hit:1
http://archive.raspberrypi.org/debian buster InRelease
Hit:2
http://raspbian.raspberrypi.org/raspbian buster InRelease
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.
pi@rpi-1:~ $ sudo apt full-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Then ran uname --
pi@rpi-1:~ $ uname -srm
Linux 4.19.66-v7+ armv7l
So - for some reason looks like the kernel is neither the 2019-07 nor the 2019-09 versions mentioned in the release notes.
Slightly confused ...