I use the TopCashBack site fairly often. (This is my affiliate link – here).
They have offered an option to transfer a set amount each year to Tesco Clubcard points. I’ve noticed today that they allow you to also do a direct exchange to Avios or BA Executive Club Avios. But this new option needs to be treated with caution.
As you can see, for my £10 credit I can have 1050 Avios/BA Avios or 1050 Tesco Clubcard Points.
Tesco Clubcard points convert from 250 points to a £2.50 voucher. This in turn can be exchanged to 600 Avios. (Some long standing members, like me, get 800 Avios).
So the 1050 Tesco Clubcard points, turn in to 4 * 600 Avios or 2400. If I had taken the direct conversion it would only have been 1050 Avios. Well worth laundering them through Tesco if you ask me.