The annual fireworks display at Wicksteed Park is taking place on Saturday 2nd November, its being done by the current fireworks world champions and it is the best display in the county. Its £5 for the display with free parking and the pavilion is usually open for drinks as well.
More details available from the link below.
I've put the time down for 7:30, the display will start between 8 and 8:30. This does clash with a drinks meet but the display will finish by 9:30 so we can head back to Northampton for the rest of the night.