I saw one of them recently parked at Filton. That means there must be at least two of them left in the world! It looked surprisingly small in the metal.
There are several. The East Fortune one (G-BOAA) that the CrinklyPride saw; G-BOAB at Heathrow awaiting placing on display at T5, G-BOAF at Bristol Filton, G-BOAC at Manchester airport, G-BBDG at Brooklands, G-BOAE in Barbados, G-BOAD in New York at the USS Intrepid musem, G-BOAG in Seattle, F-BVFF at Charles de Gaulle airport, F-BTSD at Le Bourget, Paris, F-BVFA at the Smithsonian at Washington Dulles airport, F-BVFB somewhere in Germany. Plus the development aircraft G-BSST at Yeovilton, Somerset, G-AXDN at Duxford and a couple in France.