In a surprising twist, Felix Jones has resigned as England's defense coach, further fueling the turbulence in Steve Borthwick’s backroom staff. 

Jones, a key figure since joining the England setup 10 months ago, played a significant role in enhancing England's defensive strategy after being recruited from South Africa, where he helped the Springboks claim back-to-back Rugby World Cups under Rassie Erasmus.

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The 37-year-old former Ireland international was credited with implementing the aggressive blitz defense that, after initial struggles in the Guinness Six Nations, began to show real promise. 

England's defense notably troubled New Zealand during their July tour, with close losses in Dunedin and Auckland reflecting the progress made under Jones' leadership.

Despite handing in his resignation, Jones' contract reportedly includes a 12-month notice period, meaning he could stay until next summer, if the Rugby Football Union chooses to trigger it. 

His departure is the latest in a series of high-profile exits from England's coaching staff, including the recent shock departure of Aled Walters, the head of strength and conditioning. Walters, a crucial figure on the training ground with responsibilities that extended beyond his title, has defected to Ireland. He was followed by Tom Tombleson, another long-serving conditioning coach.

The turnover in England's coaching staff has sparked concerns over the stability of Borthwick’s management approach, reminiscent of the churn that plagued Eddie Jones' era. 

Further complicating matters is the uncertain future of Kevin Sinfield, the rugby league legend who was demoted to skills coach following Jones’ arrival. Although Sinfield was expected to step down after England's tour to Japan and New Zealand, his popularity and experience may keep him within the setup, though his role remains unconfirmed.

Jones' resignation is believed to be linked to Walters' departure, with the two sharing a close professional bond from their time working together under Erasmus at Munster and South Africa. 

As Borthwick faces an autumn schedule featuring fixtures against the All Blacks, Australia, South Africa and Japan, only attack coach Richard Wigglesworth, scrum coach Tom Harrison and consultant Andrew Strawbridge have confirmed their roles. 

Whether Jones still will be involved remains to be seen, but his exit undoubtedly poses a challenge to Borthwick’s ambitions.

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