Here are some website links that you may find helpful:
Trading CITES-listed specimens through UK ports and airports from 1 January 2021 – www.gov.uk/guidance/trading-cites-listed-species-through-uk-ports-and-airports-after-brexit
https://cites.org/sites/default/files/eng/com/pc/23/Com/E-PC23-Com-02.pdf
Latest Rosewood discussions by CITES
https://www.gov.uk/guidance/cites-imports-and-exports
https://www.namm.org/issues-and-advocacy
http://www.americanorchestras.org/advocacy-government/travel-with-instruments.html
http://www.musiciansunion.org.uk/Home/Advice/Playing-Live/Touring/Travelling-with-an-Instrument
http://www.velta.co.uk/news/268/76/CITES-process-for-importing-and-exporting-rosewood/d,News/
Rogers & Norton have a Specialist Team handling HM Revenue & Customs (HMRC) claims, in particular relating to the detention of goods, seizure of goods, assessments and adverse decisions. They can assist our members with issues surrounding the import and export of goods – for example CITES licence, Coding, Duty and Vat issues. Their clients are based throughout the UK and Europe, together with America and Asia.
http://rogers-norton.co.uk/legal-services/hmrc-disputes-and-litigation/
http://rogers-norton.co.uk/helping-you-see-the-wood-through-the-trees/