Cosgrove Aqueduct Abseiling

When searching for links for my post about the 200th aniversary of the opening of the Cosgrove aqueduct (Iron Trunk) this week, I thought the only video of abseiling off the aqueduct might be that from the BBC. I was wrong.

It appears to be a favourite pastime of a group of daredevil (?) climbers. The second video hints that they have done it several times.

Does this happen at other aqueducts?