This can be stacked with the Prime free trial, it appears if you have previously used a free trial on Amazon US you may still be eligible for a free Prime trial on Amazon UK.
Make sure you register for Amazon Prime free trial THEN Audible. You must be a prime member to be eligible for the Audible deal.
I received my £10 email confirmation immediately.
Essentially £10 for nothing if you set a calendar reminder to cancel! (Or cancel straight away)
Gift balance can only be used on products sold by Amazon.co.uk.
Your £10 promotional credit will be automatically applied to your Amazon account and you will receive an email notification when it is ready to use. The credit will only be visible and applied when you place a qualifying order for new items shipped and sold by Amazon.co.uk at checkout. This promotional credit doesn’t appear in Your Account where you will only see gift card balances.
Deal credit to aaqeel on HUKD: http://www.hotukdeals.com/deals/back-free-10-amazon-credit-w…
it doesn't appear in your Gift Card balace, it's deducted from a purchase fulfilled by Amazon.