On the CAA's website
CAA statement on air show charges consultation | UK Civil Aviation Authority
From the Manchester Airshow site
"We are also aware of a consultation of CAA charges in relation to Airshows currently underway. Whilst we shall be providing a response to the consultation with our views, we should emphasise that the charges are not a factor in our decision not to hold the Airshow in 2016, and regardless of the consultation outcome, we fully intend to review the feasibility of holding a future Airshow in the coming years."
Never let the truth get in the way......and all that