The new system enables you to put multiple voucher orders into a cart so you can pay for all orders together.
Once you have added the first order to your shopping cart click '+ add to shopping cart', you will then be taken back to the ordering page.
Once you have created another order, click 'add order to cart'.
The number attached to your shopping cart (in the top right-hand corner) will change to reflect this.
Once all required orders have been added to the cart, you can then proceed to the payment.