When is your flight OP ? Often there are no reward flights available, for weeks, and then very close in seats can open up. I've noticed this especially on domestic, but for lower status they may only open in Business. So if you're happy to pay double Avios for Club Europe then grab this. Although have you check cash prices which are often very reasonable, outside of key holidays / weekends. But then you won't have the free luggage etc if that's relevant on the cheapest ticket