Just got this email:
Earn 30% bonus Avios when you convert your UR points
Top up your Avios balance and get planning for your future trip with our exciting offer. Convert your Chase Ultimate Rewards points through September 26, 2021 and you'll get 30% bonus Avios.
Plus, all the Avios you earn don’t expire as long as you have activity in your British Airways Executive Club account within 36 months so you can travel when you’re ready.*