If you have finished your contract then the box is yours to do as you wish.
 you can ignore any plastic bags they send you, they do this because as a supplier of electrical goods they have a duty to offer the recycling of it. Save the enviroment 🙂
Be careful they charged me 65 quid even though I'd sent it back in the plastic bag!
Im still waiting for a refund 2 months after leaving despite several promises of a refund.
They even txt me to say it's I would receive it within 7-10 working days, that was 20 days ago!
robbing **bleep**, I would never recommend BT to anyone..
Where the f--- is my refund BT!!!!!!
This is a customer to customer self help forum posts made here do not go to BT although the forum is moderated by BT not every post is read
The OP has obviously resolved their problem as they have marked their post as SOLVED