To test this sale, I tried the Plum 6ft Trampoline and Enclosure in Blue. It is a £159.99 reduced to £99.99. Add it to your basket and head for the checkout and the automatic discount is applied, taking £20 off, making the trampoline £79.99 - or half price. As it's still over £50, shipping is free, but if it wasn't it would have been an extra £2.95.
Another bonus is in the 2 for £10 offers. I put Hide and Seek Bugs Game and Snails and Spots, both £8 each but £5 each in the 2 for £10 offer. Once you put it in the basket, it takes another 20% off meaning you are saving £8 between the two offers, essentially getting one of the toys for free.
It's worth playing around a bit to see what you can save, and if you have a lot of toys on your Christmas shopping list, taking advantage of the free shipping over £50 is worth it too.