@Roger-Huffman said in Nexus 5 installation trouble:

however it still says the bootloader is locked

That's the problem...

Installing uTouch on a previous androïd phone, even N5, is not quite as simple than UBports supported devices list makes it think.

I will act like you already enabled dev an debbuging mode on your N5.
Now do what's told here : https://www.androidbeat.com/2013/11/unlock-nexus-5-bootloader/