He stressed that despite the decision coinciding with the culling of 80 comms jobs as part of a plan to shed 30,000 jobs across the organisation (PRWeek, 24 January), his departure was amicable.
Williams added that, following his departure, he will continue to advise the board as a part-time communications consultant.
In the role he handles all external relations with the media, government, parliament and opinion-formers, and he also advises board colleagues on reputation and branding issues, plus group internal comms.
Royal Mail is set to announce within a fortnight that it has reduced operating losses by a third – to around £200m – in the first year of chairman Allan Leighton’s three-year programme of cutbacks.
Williams, who joined Royal Mail ten years ago as director of PR and was promoted to board-level status in 1995, said: ‘The internal challenge is probably greater than the external challenge at the moment. There is a feeling we have turned the corner.’