Interesting that the armed forces role link states:
"In accordance with Lady Thatcher’s wishes, a flypast will not take place."
Reportedly, she didn't want the expense of a flypast to be lavished on her funeral.
However, we all know that the marginal cost of a flypast is pretty low, probably almost zero on a normal working day. They can almost be considered valuable training (time on target - no pressure!).
This could be rather awkward for the RAF... the public will take the 'too expensive' reports at face value, and then question why, if a flypast is a waste of money for Maggie's funeral, it's OK at things like passing-out parades, military tattoos and assorted sports events graced by RAFAT. On the other hand, if flypasts are cheap, she should have known that, and perhaps was just indifferent to the Air Force! How do you spin those possibilities?!