Some banks and card companies often block larger card payments to foreign countries by default. This is most probably the reason why your card payment didn't go through.
Please contact your bank (if debit card) or your card company (if credit card) and ask them to manually approve your purchase. If they cannot perform this, ask them to accept your upcoming purchase and then place a new order in our web shop.
One example of why the card might be declined is it suddenly are used in a new settings. Sometimes a farign vacation might trigger a block. or for example, a high value transaction made at 3 a.m. from a foreign-based merchant without any extra authentication, may trigger a few too many risk checks on the issuer side. Call or contact your bank and let them know about the transaction — especially if this transaction is happening outside of the country that the customer’s bank is located in.
An other option is to choose the Paypal payment option in the checkout and then pay with card without using a paypal account. (The option is available even if Paypal tries to hide it)
We’re really sorry about all this, but the problem is caused by British banks and card companies.