The route was first climbed by John Arran and has seen numerous repeats over the past decade.
Oli took a couple of falls on to tensioned down skyhooks before his successful ascent.
He commented on his blog:
"It was between these blizzards that I climbed The Zone in cool march sunshine. It all went so smoothly in the end, like it always does. Didn't have any expectations when I woke up to the tundra that morning, so it was even better to eventually do it. So good to top out, but as I topped out I almost wished I was still on the crux, as the process was at the end of the day, good fun."
All the action is captured in this video:
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