Originally Posted by mrvincent

I think this therefore confirms that those with pre-existing accounts have a transfer limit capped at their previous, pre-bonus, Avios balance (but can make unlimited transfers of this value). Anyone with a new account will not be able to transfer, as this will be set at zero.

Lookup process automation tools - see if you can get your computer to do the leg work for you. I have a Mac and used the in-built Automator to run through this a couple of hundred times. [My threshold was slightly higher but I didn't go for the full 90k]