That original Oslo flight posted at the top of the thread has been cancelled - would have been a great investment if you were planning on that route sometime in the next year!
What are the ethics of booking cheap fares in the hope of them getting cancelled (and thus getting free rebooking options)? While the flexible booking policy is ongoing till the end of May this seems like a no brainer, unless I'm missing some downsides. Surely BA would be grateful for every penny at the moment.