Amazon - Free £5 credit with top up
You can get a free £5 when you top up your Amazon account by £80 or £100 depending upon your account.
It’s only valid once per email address, so you need to check you’re eligible via the given link.
You may also be able to view this offer when you go to Gift card and View balance option in your account details.
So if you are gonna spend considerable amount then do take advantage of this offer.
For me it was 5 on 80