If the issue is the APD then an other issue is that such a small percentage of Brits travel by air - that in general we do not care how much it costs ! Those on business do not notice it and those that may travel 2-3 times a year just put up with it.
In the same way we put up with the 'fuel' costs ( prices on the way up ). I believe more people care about immigration, fuel costs and the state of our roads.
We are fed so many conflicting statements about what tourists earn us or cost us - if it is government based 'facts' then it is worth nothing.