Reply from Justine11 Mar 2021 14:42
I emailed Justine asking if she could shed light on these cancelled trades, here is her reply...
I’m not sure of the specifics that you are referring to, however the only reason that we are aware of that would cause a share trade to be cancelled if there is an input error or delivery issue, so it has to be cancelled and rebooked as an example. We are not aware of any other reason.