HMRC's guidance on claiming back overpaid import duty and VAT now states that repayments can only be made to a UK bank account. Claims through the Customs Declaration Service and form C285 both ask for UK bank details: sort code, account number and account name.
Most overpayment claims must be made within three years. For declarations made in the Customs Declaration Service, a claim needs a commercial invoice showing the value of the goods and the amount that should have been paid.
VAT-registered importers cannot use these routes to reclaim overpaid import VAT. Instead, they reduce the output tax in box 1 of their VAT return and keep records to support it.
Sources
A summary of the public sources above, checked when it was published. General information, not legal, tax or financial advice.

