New Zealand winger Caleb Clarke has been ruled out of Saturday's test against England at Twickenham after failing a head injury assessment following a head-knock in the 25-17 win over Scotland.

Clarke's setback follows ankle problems which have limited the outside back to three tests this year.

"It’s unlucky for him," All Blacks assistant coach Jason Holland told New Zealand media.

"Caleb is a loss, and we’ve got a couple of big decisions to be made in the next couple of days about how we get the best guys on the park to start and finish the game."

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