Love Lula lets you collect points per spend enabling you to save up for a product you want for free! They also offer a choice of up to 3 free sachet samples (subject to availability). For a 5% discount use code BB12. They now offer supersaver free delivery which takes 5-8 days to arrive. If you need your delivery sooner you can pay £3 for arrival in 1-3 days.
Naturisimo offers up to 5 samples per order (some are free and some you have to pay for). They also offer free gifts with purchase and free postage. If you sign up to their newsletter they will send offers to you by email.
Amarya a site I heard of via a Natural Health magazine offer. I signed up to the monthly beauty box (in September I subbed for the year for £100 plus I received a free Santaverde gift set worth £56). I have used this site to buy a moisturiser which featured in one of the boxes with 15% off. They offer free postage but no samples with order.
Can you suggest any other organic UK beauty sites I can look at?