In reply to a lakeland climber:
<It's nowhere near the longest which I believe is still that from the summit of Mount Asgard on Baffin Island at around 5000ft.>
Is that correct? More likely Mt Thor, I would have thought. I think that Asgard's highest elevation is the eastern one, at somewhere between 3,000 and 4,000 ft; but it's relatively low-angled, and would be a real pain to abseil. The much steeper west/northwest side is, I think, a bit shorter. And there's no easy way to the top of Asgard, which would either mean a substantial operation to get the kit up there, or use of a helicopter - which I think is outwith Park regulations. Obviously one might descend a route on the west side after a successful ascent, but that wouldn't be a single, continuous abseil - which I think is what this thread is talking about.