After being appointed managing director of England men’s cricket, Rob Key decided to split the red and white-ball coaching jobs. Key previously described Silverwood’s role as all-format coach as “an impossible task”, but has now been persuaded that McCullum can do the role in all formats.

“I’m delighted that Brendon has chosen to do both roles now with England,” Key said. “I believe we are incredibly fortunate that a coach of his quality is prepared to commit wholeheartedly to English cricket.

“Being able to align all teams now is particularly exciting and we look forward to taking on all challenges that come our way.

“For the last two years, constant clashes between formats have made it challenging for the white-ball environment; fortunately, these are easing starting from January.

“The timing of the schedule [from January] will allow him to dedicate the necessary focus to both roles, and we’re confident this restructure will bring out the best in our players and coaching staff.”

McCullum said that he was relishing the chance to work with the white-ball captain, Jos Buttler.

“This new challenge is something I’m ready to embrace, and I’m eager to work closely with Jos and the team to build on the strong foundations that are already in place.

“Rob Key’s vision for the future of English cricket is something that really resonated with me. The idea of a unified coaching structure, especially with the schedule easing next year, made perfect sense. I’m energised by the prospect of guiding both teams and am grateful for the support from the ECB and my family as I take on these added responsibilities.

“The talent within English cricket is immense, and I’m looking forward to helping these players reach their full potential. My goal is to create an environment where everyone can thrive and where we can continue to compete at the highest level across all formats.”