Payment can be made by either:

Ebay:
Paypal

Website:
Credit or Debit card through the website or over the phone
Postal Order
Cheque (make payable to "The Green Spark Plug Co")
Bankers Draft
Bank Transfer UK and International (details below)

The Co-operative Bank
Account Number: 69060191
Sort Code: 089299

International Details
BIC: CPBKGB22
IBAN: GB13 CPBK 0892 99690601 91