Repairing Render Crack

Lemag

Hi there,

I'm looking for advice on how to repair this crack in the render at the corner of an external wall. It's not easily accessible, starting at roof (just under the lead work) and continuing down for a little over 1.5 meters until about 5.5 meters above the ground. I'd rather the best solution without have to strip and rerender. Any advice regarding technique and materials to use would be greatly appreciated.

Thanks a million.

Edit - the orientation of these images is correct on my laptop but I can't seem to upload them with the correct orientation here :-(

10-10-20

Can't easily tell, but that looks like a failure/de-lamination of the angle bead.

Is it springy to touch? Is there rust appearing behind the broken pieces?