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Don't worry about Promotional codes or shipping charges at the moment.
These settings are just part of an extended programme we are developing for the future.
You may be asked for a shipping option to proceed. Please just choose 'Standard Free'
You don't have to have a Paypal account to book. If you just want to make a normal card payment choose the payment option on the right, the one that says CHECKOUT.
You will be taken to a separate card paying portal in PayPal.