I also have a couple of Lloyds vouchers for July flights. The agent was happy to rebook me to anywhere in the same avios zone for January 2023 after talking to a supervisor. I have held fire on rebooking, if Japan opens up I will try and get rebooked onto JAL. Losing the Lloyds vouchers wouldn't be too bad as I have some unused 241s and the increase in BA Surcharges makes them less valuable.