Amazon Prime is a membership program offered by Amazon, entitling members to discounted shipping on purchases. The £51 annual membership fee entitles a subscriber to free two-day shipping and £2.50 one-day shipping on eligible purchases -- in addition to other discounts on shipping costs. Amazon offers free trial Prime memberships, which automatically become paid memberships unless the subscriber manually cancels before the trial period expires. Cancelling an Amazon Prime membership is done via the Amazon.com website.
Navigate to Amazon's "Manage Your Prime Membership" page and click "Do not upgrade" to cancel your free trial. You will still continue to receive Amazon Prime benefits until your trial period expires. If you change your mind during the remainder of the free trial period and wish to become a paid subscriber to Amazon Prime, go back to the "Manage Your Prime Membership" page and select "Automatically upgrade."
Navigate to Amazon's "Manage Your Prime Membership" page and click the "Cancel membership" button to cancel your paid membership. If you have not yet placed an Amazon Prime-eligible order, you will receive a full refund of the £51 subscription fee.
Navigate to Amazon's "Manage Your Prime Membership" page and click "Do not auto-renew" to cancel your subscription at the end of the membership period. You will still continue to receive Amazon Prime benefits for the remainder of your membership period.
Remember the expiration date of your free trial period to avoid paying the automatic £51 fee to become a paid subscriber.