Originally Posted by
whiskerxx
I have similar circumstances, canceled reward F flight to Sydney. Via telephone offered a refund or the only award seat available in November, which is World Traveller.

I was politely advised that if I didn't like it I should contact Customer Services via BA.com.
I did that and received a reply which basically says they (Customer Srvices) cannot rebook, they don't have the necessary tools to hand, but also said I had no grounds for a complaint because that which I had been offered was correct, and outlined in the BA terms and conditions for Avios bookings.
I've replied and asked them to confirm if they are suggesting BA terms and conditions supercede EU261.
Lets see what happens next
Please update as and when... thanks