Despite the increasing costs the first two of the development batch aircraft were completed. Engine development and undercarriage problems led to delays for the first flight which meant that the TSR-2 missed the opportunity to be displayed to the public at that year's Farnborough Airshow. In the days leading up to the testing, Denis Healey, the Opposition defence spokesman, had criticised the aircraft saying that by the time it was introduced it would face "new anti-aircraft" missiles that would shoot it down making it prohibitively expensive at £16 million per aircraft (on the basis of only 30 ordered).