Do you have to pay with PayPal?
No. You can pay online with any credit card. Whilst the shopping cart system is run by PayPal, if you don't have a PayPal account you will be offered the option of opening one or you can choose to pay with any credit card without opening a PayPal account by using the plain orange 'Check Out button.'
Alternatively you can pay by cheque or bacs transfer.
More details on the How To Order page.