Thank you for the feedback.
If I move a component the tracks don't follow it. When I move the barrel jack down as far as I can I will still have the screw head screwing down onto the GND pad.
Besides, it's still a little draft as I'm not 100% certain on the footprint of the DC jack. It is assuming I go for a standard SMD one, but I think through hole might be cheaper. So when I make a concrete decision on that I'll try and move it to accomodate the screw.
I also have to test the size gain/loss with using a TO-92 version for U1 (LM78L05) as I already have them in stock (IC / U thing was just an oversight
) That will move things around a bit too.
I'm starting to realise that for these small boards you spend a lot of time starting from scratch, but each revision is 'usually' better.
It did pass DRC checks, but I think the nudge router is set to assume absolute minimum clearance is fine, maybe I should up my minimum clearance a bit until I need it lower.
However I already moved the tracks away from P8 on IC1. You are correct I should via down to the back layer for the pins on the other side of P1, thanks.