London Underground has lost its media relations manager of six years following the resignation of Philip Carter.
Carter will hand the job to current head of public affairs Claire Filby when he leaves at the end of March.
'I planned to leave last year when the PPP (public-private partnership) was due to begin. Because of implementation delays, I agreed to stay to help with communicating the change,' said Carter.
Carter could not confirm his future plans, but said he hopes to remain in PR: 'I intend to continue working in the media. It is the key to developing successful PR and communications strategies for any organisation.'
Filby becomes combined head of press and public affairs with immediate effect, reporting to director of communications Tony Maguire.
In her expanded remit, she heads a team of 12. Part of that job includes producing the travel page of the free daily commuter newspaper Metro.
She has been with LU, previously London Transport, for six years.
LU in-house communications may be set for more changes when the body joins Mayor Ken Livingstone's Transport for London, a move which is scheduled to take place in the summer.