"HM Customs & Excise National Museum" redirects here. Seized! The Border and Customs uncovered is the Border Force National Museum (previously - UK Border Agency), located in Liverpool, England and holds the national collection of HM Revenue and Customs, one of the most important collections of its type held anywhere in the world. Originally HM Customs & Excise National Museum, the collection is now a gallery located on the basement floor of the Merseyside Maritime Museum at the Albert Dock.