I'm easily confused but I was told by the Canadians that this was a direct result of disorientation due to dust, doesn't seem to match the official line/press release. Maybe it is something to do with the fact that the SOP is to O/S if references are lost? and we all do that don't we.
At least if the reported version is correct then the UK MOD bean counters will not have to worry about procuring a perfectly good solution to mitigate "brownout", that is until it's one of ours and the crew/pax aren't so lucky.