That was a fat finger typo by me; the file is recovery.img. I downloaded the zip and extracted it, and then went back and downloaded the .img just to make sure it wasn't a bad download. I'll edit my original post. Thanks for pointing that out!
Do you have addonsu installed? https://download.lineageos.org/extras
Hmm, I do not. Didn't even realise it was a thing. Thank you; I will start with that.
That did the trick. I installed the su module, rebooted, then the su re...
I've installed this twice, and rebooted a number of times. No luck for me.
I've got the April 1st, 2018 android security patch.
Oddly, this worked prior to me resetting my phone. I used to have the July Security patch and it worked fine, I rev...
Thanks, working a dream!