DEMOLITION – Hovercraft PRINCESS MARGRET – 12.03.2018. PRINCESS MARGRET was built by British Hovercraft Corporation for Seaspeed and stretched in 1977. Transferred to Hoverspeed on creation of the company in 1981. Withdrawn in 2000.  The SR.N4 (Saunders-Roe Nautical 4) hovercraft (also known as the Mountbatten-class hovercraft) was a large passenger and vehicle carrying hovercraft built by British […]