In 2018, the England and Wales Cricket Board (ECB) announced the launch of The Hundred in 2020, which would supersede the existing premier women's cricket tournament, the Women's Cricket Super League. To go alongside The Hundred, the ECB announced a plan to launch a new 'regional elite domestic structure for women's cricket', which would include the awarding of 40 new full-time professional contracts for non-England players.[4][5]
These plans were put on hold due to the COVID-19 pandemic, but the Rachael Heyhoe Flint Trophy was eventually scheduled to begin in August 2020, with six new teams competing, alongside two teams carried over from the WCSL, Western Storm and Southern Vipers. The trophy was named after former England player Rachael Heyhoe Flint, and was intended to be a one-off, in light of the pandemic.[6][1]
In February 2021, the ECB announced that the Rachael Heyhoe Flint Trophy would continue for the following season, alongside a new Regional T20 competition, with a slightly altered format.[3] Southern Vipers and Northern Diamonds again reached the final, and Southern Vipers were again victorious, claiming their second title.[7]In2022, the Vipers and Diamonds once again reached the final, but this time the Northern Diamonds won by two runs, claiming their first title.[8]
Ahead of the 2023 season, it was announced that the tournament was expanding, with teams now playing each other team home and away.[9] Southern Vipers won the tournament, their third title, beating The Blaze in the final.[10]
In the 2020 season, the teams were separated into a North and South Group, and each team played six group stage matches, in a double round-robin format. The two group winners played each other in the competition's final.[12][6] In the following two seasons, the eight teams play each other once in a round-robin format. The second and third placed teams competed in a playoff, the winner of which played in the final against the first-placed team.[3][13] In 2023, the tournament was expanded, with teams playing each other twice, home and away, in a double round-robin format.[9] Ahead of the 2024 season, full semi-finals were added, with four teams now qualifying from the group stage.[14]
Teams receive 4 points for a win. A bonus point is given where the winning team's run rate is 1.25 or greater times that of the opposition. In case of a tie in the standings, the following tiebreakers are applied in order: highest net run rate, team that scored the most points in matches involving the tied parties, better bowling strike rate, drawing of lots.[15]