I have today booked a LHR-DOH-LHR flight for later this week and early next week in WTP. Expertflyer says no Avios upgrades available for either BA123 on 25 April or BA122 on 29 April. MMB not allowing Avios upgrade, either, despite the flights being wide open in all classes. Perhaps there will be a POUG offer at some point; it looks as though the flights are going to be fairly empty so you'd have thought the revenue management would want to extract every last penny of potential sales on the route. I will wait and see.