Thank you for your inquiry. IPR (Inward Processing Relief) is a method that allows goods to be imported for processing into the UK without Duty or any other taxes being charged. Please inform the importer contact HM Revenue at 0845 010 9000 for general advice.
If your consignee decides to use a customs agent to complete the import entry, it is advisable to provide them with written instructions so they are aware you are importing to simplified IPR and you are aware of the conditions associated with this relief.
Moreover, they can arrange clearance with UPS/UK at 44 207 9490190