Rugby Australia unrest continues as board member quits just over one month after arrival

Rugby Australia's succession plan has suffered another jolt with the messy resignation of board member Peter Wiggs after an email exchange with the man many expected him to replace.

Touted as RA's next chairman since his arrival in March, Wiggs had been pushing for Australian Olympic Committee boss Matt Carroll to immediately succeed departed chief executive Raelene Castle.

Interim chairman and acting CEO Paul McLean entertained the prospect, according to emails published by The Australian on Wednesday.

However, citing a conflict of interest because of Wiggs' friendship with Carroll, McLean suggested the former remain as a director and instead promote incoming board member Hamish McLennan to the position of chairman.

Fellow board members had reportedly pushed back on Wiggs' hasty plans that would have skipped any formal recruitment or interview process.

Supercars chairman Wiggs, instrumental in steering RA's player pay-cut deal during his brief rugby posting, replied by saying what little regard he had for the board had "extinguished" and he would resign on Wednesday.

Confirming Wiggs had done just that, McLean said he "understood his reasons" for departing.

"He has undertaken some very important work and has made a valuable contribution to the organisation, in a very short time, and we are thankful for his contribution," McLean said.

"The immediate priority of the board is to install a replacement for Peter, and an interim chief executive."