Survey company “Rewards for Thoughts” have partnered with Avios and are currently offering 600 free Avios points for registering and completing your first survey.
Important note: it does seem that the surveys are only available to people i) giving a UK address and ii) accessing the survey from a UK IP address. If that doesn’t apply to you, and you have the time/energy, you can generate a UK address here, and then use an IP mask to “put” your computer in the UK.
Should you wish to, further surveys can also be completed – you’ll earn 25 Avios for short surveys and 50 Avios for long surveys. Avios will (apparently) post to your account five days after completing each survey.
I know the purists amongst you will say it’s not strictly free Avios as you have to complete a survey. You’ve got me here. If you’re insistent on this point then it’s still 550 free Avios as you’d normally get only 50 for the survey…