They told me in webchat they cannot change until they issue their April policy. They are aware of the iata timatics rules but still have to wait until back office reissue the policy before they can do anything. I suspect by end of the week they will have something specifically for BLQ/LIN etc through tickets to HKG. I made clear my intention was not to postpone or refund as I wanted to be in HKG for those dates I had already booked. I guess we’ll see if they allow origin change