Brendon McCullum is glad to see positive signs in Harry Brook's captaincy of England's limited-overs sides.

England won all six of their white-ball matches against the West Indies, three ODIs and three T20Is, getting Brook off to the perfect start as captain.

They sealed the second series sweep with a 37-run victory in Southampton, posting a highest-ever total on home soil of 248 runs.

McCullum praised Brook for his seamless transition into the captaincy role.

"Any time you go through a period of transition and change, you have aspirations and hopes on what you can achieve," McCullum told Sky Sports.

"Sometimes, they happen quick, and sometimes they take a long time to embed.

"But in the last couple of weeks, we have seen a clear blueprint of how Harry Brook wants this cricket team to run and his style of captaincy. That's a real positive.

"He doesn't like to make things complicated. He likes to keep it simple. That's a compliment; it's a great skill.

"His calmness, his poise, his ability to keep it simple rubs off on other guys. He's also captained a lot of sides growing up, so he's got great friendships with guys who understand how he works."

Harry Brook's England  pic.twitter.com/eU0obs0wV0

— England Cricket (@englandcricket) June 11, 2025

Former captain Jos Buttler won Player of the Series in the T20Is. McCullum said Buttler still plays a crucial role in the team.

McCullum added: "It's a real positive for Brook and the team to have Jos [Buttler] in the ranks and contributing the way he has.

"He's been outstanding, and not just on the pitch but also in the dressing room and around the group.

"It reminds me a lot of Joe Root when it came to Ben Stokes' Test captaincy. It's a good mark of someone's characteristics."