In a 2019 study the Nene derby was revealed to be a reciprocated rivalry, with the largest percentage of fans of each club considering the other as their rivals.

The first match between two clubs took place in the final of 1936–37 Maunsell Cup at London Road and ended in a 3–2 away victory for Northampton Town.

Following Northampton's promotion, Peterborough United chairman, Darragh MacAnthony congratulated them and referred to the derby as "The one real 'local' rivalry I've experienced in 15 years at Posh.

[4] The second league derby of the season was originally scheduled to take place on Saturday 17 April 2021, however, all English football matches on that day were rescheduled as a mark of respect for the funeral of Prince Philip.

[5][6] While the proximity of the clubs was the main root of the rivalry between Northampton Town and Peterborough United, other events have fueled the division.

Some of the evidence presented in the court case that followed included "Sticks with nails embedded in the end, part of a brick, broken bottles, a large beer can and a pint mug.

It has been said that "Northampton fans have never forgiven Peterborough for taking star strikers Tony Adcock and Bobby Barnes when the Cobblers were cash strapped.