Hi Zig Zag,
Chainline looks pretty good eg steel straightedge used for alignment, chain ring, cog and chain are fairly new and all replaced at the same time and have roughly 600 km of use. At start no noise or grinding, which I assume was the grease on chain from manufacture. Chain tension is good, certainly no tight spots and wheel is free running, new wheel and bottom bracket. Noise started to come after I had started to oil chain, some 300 or so in.
Therefore I guessed at chain lube.