India, March 1 -- England's recent surge in the T20 World Cup is the beginning of the "Harry Brook-era", built on a calm and clear mindset rather than perfection, believes all-rounder Will Jacks.

Brook endured a difficult build-up to the T20 World Cup, beginning with a disappointing Ashes and followed by a high-profile drunken altercation with a nightclub bouncer in Wellington, casting a shadow over his leadership. But he has responded with a 100 against Pakistan to seal England's semifinal berth with a match to spare.

Against New Zealand, the already-qualified side showed no drop in intensity, recovering from 117/6 in 17 overs to chase down 160, with Jacks and Rehan Ahmed finishing the job.

England thus advanced with three wins from t...