The brake lines now secured down each side of the engine bay with P clips. The two clips near the front of the car are nearly impossible to drill - even with a shortened drill bit (i.e. one I snapped by accident earlier) & 90 degree attachment, all the chassis tubes converge to leave very little space for working:
While the completed job looks fine, the holes for the frontmost clips didn't end up too pretty & the drill bit did spoil the powder coat as it wandered due to the angle I was drilling at. I used a little black hammerite to make good.