PACE bowler Steve Harmison insists it is time to ‘‘move on’’ from international cricket and concentrate on his career with Durham.

The 31-year-old, left out of England’s 16-man party for the four-Test tour to South Africa, yesterday committed himself to the county champions by signing a four-year contract.

Harmison’s record abroad does not compare favourably with his form on home soil and ahead of the squad being announced, he said he would consider announcing his retirement from international cricket if England did not give assurances he would be more than a ‘‘bit-part’’ player.

Although he has not closed the door on further international action, the Ashingtonborn player, who has taken 401 first-class wickets for Durham, believes England are in safe hands.

He said: ‘‘I’ve said everything I wanted to say on the England front – it’s time to move on.

‘‘England are going through an exciting time with a group of young fast bowlers in South Africa. The pitches will be helpful for them and I really want them to do well.

‘‘I loved playing for England and I would if it came again.

But in 2010-11 (at the Ashes in Australia) I’m not sure my body would be up to being on that tour.

‘‘They’ve said they are going with someone else, and that’s fine by me.

“I hope they stick with that policy and that the public will stick by them if times get hard. I hope they do, really.

‘‘From my point of view that’s why I wanted to sign a longer contract with Durham – to prove I want to be here for a long time.

“I might not play after the four years are up, but I’d still like to be involved.”

‘‘South Africa is going to be really tough and there are going to be some hard days coming up.’’ The two-times Ashes winner added: ‘‘If they stick with that policy then I think England will be fine. Winning the Ashes in Australia will be hard but I honestly wish them well.’’ However, Harmison is looking forward to making a big impression in the county game.

He explained: ‘‘I have always loved playing cricket for Durham and I’m incredibly proud to represent the club and to be part of the set-up here.

‘‘I’m looking forward to the next four seasons, especially 2010 as we look to win the Championship for a record third year.’’ Harmison, who last month claimed the wicket which clinched Durham’s title-winning victory over Nottinghamshire, was voted the county’s bowler of the season for the second year in succession.

Head coach Geoff Cook said: ‘‘Stephen is a huge asset to our team. He has a great presence, both on the field and in the dressing room, and his commitment and dedication to the club have always been fantastic.’’ Chief executive David Harker added: ‘‘Stephen is a great performer for Durham and we are absolutely delighted that he will remain a major part of the team for the foreseeable future.

‘‘Off the field we have a number of young players benefiting from his experience and guidance and that contribution cannot be under-estimated.’’