We are a fast growing company that makes high-tech items for major sports and music events. We import a locking mechanism from China which is then sent as a free issue product to a Tunisian manufacturer of the final product. The Tunisian manufacturer fits the locking mechanism and then supplies the finished item back to the UK. They have been paying varying degrees of duty on these transactions and are now questioning whether the duty levy is valid on a free issue temporary import. Can you advise if there is any way around these import duty costs in Tunisia?