Since its excited some comment - Mr Hart can be seen here on 'Watch: BBC Spotlight Channel Islands:
http://news.bbc.co.uk/1/hi/world/eur...ey/default.stm
About 5 minutes in - I've corrected my post above replacing my paraphrasing of his comments with a direct quote.
He does make a good strategic point - it would be a bad idea for any airport to be reliant on one airline.