Whittaker confirmed that he was on hand to advise the former M&S boss who, along with chairman Luc Vandevelde, was dropped from the high street retailer at the beginning of June.
M&S’s new chief executive Stuart Rose is to explain his strategy for the company at a presentation next week (12 July).
ReputationInc is preparing for any negative comment on Holmes’s three-year record, though a spokeswoman for M&S said Rose would not be making any comments on the company’s past management.
‘Our objective is to ensure that Holmes’s track record is covered fairly and accurately in the press,’ said Whittaker.
Rose’s replacement of Holmes was widely viewed by the media as a PR coup after declining sales made the retailer vulnerable to a takeover bid from Arcadia owner Philip Green.
Whittaker has over 15 years experience as a board director of retail group Kingfisher.