The spectacular aircraft roared through the county at around 11.19am this morning (Wednesday), giving residents a click glimpse.
Pilots from the RAF display team will be heading home to Lincolnshire after a 645mph 'practice' formation flight around England.
It was expected to that the nine Arrows' BAE Hawk aircraft about four minutes to cover 30-odd miles across Northamptonshire heading south from the Chilterns towards Leicestershire and then on to their base at RAFA Scampton.
The planes are powered by a single Rolls-Royce Turbomeca Adour Mk 861 turbofan engine producing 5,700lb of thrust and giving them a top speed of 645mph.
