Alastair Cook can look forward to overseeing a new England era, perhaps alongside Ashley Giles, perhaps in the company of Jonathan Trott - but definitely, of course, without Kevin Pietersen.

Cook has given his captain's seal of approval for England's "brave call" to axe their record runscorer.

On the day Trott made his first tentative return following his early departure with a stress-related illness last November from the Ashes drubbing down under, Cook spoke for the first time since the England and Wales Cricket Board called time on Pietersen's international career.

In doing so, he left little room for any residual doubt about his own role in the process which left the South Africa-born batsman out in the cold for good.

England's Test and one-day international captain confessed his frustration at not being able to speak freely about the reasons for the parting of ways after the winter whitewash, advising patience before the full story is told "soon".

The ECB made it clear, in a statement shortly after Pietersen's enforced international retirement in February, that the defence of issues such as "trust" and "team ethics" underpinned their decision.

England have gone on in Pietersen's absence to conclude their winter of discontent with a lacklustre ICC World Twenty20 campaign, ending in an embarrassing dead-rubber defeat against minnows Holland on Monday.

Cook played no part in that either, because he is not currently in England's team in the shortest format.

The opener is due to return in next month's ODI against Scotland in Aberdeen, by which time England will have a new head coach in place following Andy Flower's resignation as team director in January.

Cook does not yet know therefore whether he will be working with limited-overs coach Giles - in an enhanced role - or one of a clutch of other contenders, all to be interviewed for the job this month.

He has no qualms at all, however, about the decision to omit Pietersen from England's future.

"It was a brave call which took guts and consideration," said Cook.

"You do have to say at some point, 'This is the way we're going to do it moving forward.'"

Various versions of events have been put forward about the apparent breakdown of Pietersen's working relationship with management at the start of this year, a repeat of history twice over following his power struggle with former coach Peter Moores in 2008 and his well-documented disagreements with Flower and then captain Andrew Strauss in 2012.

It was Strauss' successor Cook who reportedly helped to facilitate Pietersen's reintegration two years ago.

But this time, he said: "We all know how important team culture and team unity is.

"It was obviously a very big and important decision.

"I know things will become clearer in a little bit of time.

"I know it is frustrating. It is frustrating for me, because I have not totally been able to tell my side of the story. People just have to be a little bit patient."