Just back from Eastnor Castle and Mountain Mayhem 24hr race. I was not racing but providing catering and mechanical help to the Ashton MTB club (6 teams, 1 solo!) I did use the time to test the tarp / bivvi / sleeping bag and found it super good. I only managed about 4hrs in it as I had people to rouse and bikes to fettle but it all worked...despite the 30mph winds and driving rain.
No pictures but the tarp was strung at and angle against a fence so Sheldon and my self could (easily) get our heads and chests under it only leaving our legs exposed.
More when I have had some sleep