Get £10-20 in Amazon vouchers when you sign up to Voxi using my referral link below. Just order your sim via the link below and provided you pay for at least 2 months you will have an Amazon voucher delivered to your inbox for the value of 1 months ‘plan’ (so paying for the £10-12 plan will earn you a £10 voucher, the £20 plan will earn you a £20 voucher, etc.). Voxi is the Vodaphone giffgaff equivalent, offering incredibly affordable rolling monthly contracts with loads of perks.
ID isn’t required for sign up.
Currently available to the UK.