Scott Robertson said he's submitted a formal request to be part of the coaching lineup.
Officials have warned the tour could be pushed back 12 months.
The four 'Home Unions' make almost no profit from the five-week tour.
The two teams played out a drawn series in 2017.
Willie John McBride has called the proposal "nonsense"
The 'decider' would take place at Twickenham in June 2021.
The two marquee sporting events will run side-by-side.
Clayton McMillan will take over from Warren Gatland for the year, who will be on British & Irish Lions duties.
The All Blacks hooker will start in the biggest test of his career to date.
The Welshman planned to run away, until a phone call with a family member.
The former All Blacks hooker has only lost two of six tests at the helm.
The All Blacks haven't played England in a rugby test since 2014.
The former Wales captain has not played since leading the 2017 Lions to a drawn series against the All Blacks.
He derided the NZ coverage during the Lions Tour, but said he'd like to coach a Super Rugby franchise.
The former All Black has said he will never take the reins of the Lions again.
The England loose forward has lauded his national coach as a rugby mastermind.
The English lock admits the tourists were fueled by the over-confident attitude of their hosts.
English prop Kyle Sinckler was involved in a "minor incident" after Saturday's third Test.
Chiefs coach Dave Rennie is working to ensure calls like that don't happen again.
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