tivvy,
as a halberton boy living in watford i sympathise with you.
i was nervous at first but after doing a few flights and getting used to it, ( i am scared of heights, big time! ) i try to make myself stay relaxed, i used to practice this. big breaths, telling myself to calm down and relax, and such like. now i can get on planes no big deal.
please don't allow a thing like this to stop you enjoying travel especially as it looks like flying will disappear soon if the global warming guys have their way.
half this reply doesn't make gramatical sense, but take what i've put as it's meant.
and enjoy your holiday!!!!!!