Or you can sent it to the airbnb and go to the post office to route it to where you want to receive it, it’s been done here but I don’t know if is the same in UK. It’s a paid service you can subscribe for a specific period of time.
anyway, I had my interview yesterday and was verbally approved but my status on ceac is updated to Ready with yesterday’s date as the last updated I’m kind of sceptical now, it should have been approved.