GLASGOW south MP Tom Harris has stepped down from his role on the front bench.
The Labour man claims he has been unable to cope with the responsibility coupled with commitments to his family.
Mr Harris was appointed shadow environment, food and rural affairs minister in May last year.
In his resignation letter to Ed Miliband, the former minister said: “You and the party need frontbenchers who can fully commit to holding the coalition to account.
“My talents, such as they are, do not extend to being an effective front bencher as well as a good husband and father.”
Mr Harris, an MP since 2001, has three sons.