Hoverlloyd had a third machine named Sir Christopher after the inventor of the hovercraft Christopher Cockrell.
For a time in 1979 the SRN4's were joined by an "Aeroglisseur" in the form of the French SEDAM N500. Travelled on a day trip to Boulogne. Much higher over the water than the SRN and on my one trip less prone to pitch/roll in swell (kept my escargot down!). Engine vibration grounded it, was left rusting at the former Boulogne hoverport for several years.
Airbanda-proud to be an anorak.