It would be a shame to see the SRN4 scrapped. I only travelled across the Channel by hovercraft once, back in the early 1970s on the Ramsgate to Calais route in the pre-stretch Mk1 version. But in later years I used Hoverspeed's SeaCat service to Ostende (now sadly terminated) and would often watch the skill of the SRN4 captains as they manoeuvred their beasts at the adjacent hoverport.
A great pity that there aren't any ferries to Belgium from the South these days, the SeaCat route was perfect for trips to Germany rather than an extra hour through France.