The transport minister and Devon MP David Jamieson has announced he will be standing down at the next election.
Mr Jamieson says it is time for a new person to take on the job
Mr Jamieson, 57, has been an MP in Plymouth for the past 13 years and says he feels he has achieved all he set out to and that it is time to move on.
The Labour MP represents Plymouth Devonport with a sizeable majority of more than 13,000.
He says he has reflected on his decision since Christmas and that it is like a chapter coming to a natural end.
'Take it forward'
"I thought long and hard and talked to a lot of constituents," he said.
"I thought perhaps this was the right time."
Mr Jamieson says the new plans for Plymouth which involve an ambitious rebuild for much of the city, spearheaded by world renowned architect David Mackay, also played a part in his decision making.
"Seeing this new vision they have for Plymouth is very exciting," he said, "but I think that it probably now needs a new person to take it forward."