You will need to check you have:
1) added your payment card to the drop down credit card box
2) selected the Visa debit or MasterCard debit drop down option
3) add long card number
4) add 3 digit code on the back of the card
5) add your address where you have registered the payment (Visa,MasterCard & Discover) card
6) agree to terms and conditions and click proceed to confirm and complete your transaction
On the basket page please note you are not required to enter the start date of your Credit card or Debit card if your Credit card does not have one displayed on the front of the card.
You may be asked for additional verification information this is to protect your Credit card against fraudulent transactions, in the event that your Credit card is declined please check with your Credit card provider and then resubmit your payment on the basket page to complete your booking.