Manly will farewell 2008 NRL grand final hero Michael Robertson at the end of the NRL season with the veteran winger to join Super League side Harlequins.

Robertson will join Sea Eagles teammate Shane Rodney in playing for the London-based side in 2012, his departure on top of that of Will Hopoate (Mormon mission) leaving Manly short on outside backs.

His leaving will likely result in youngster Michael Oldfield securing a regular NRL berth, while the club is also believed to be keen on bringing Ben Farrar back to the club next season.

The 28-year-old winger has played more than 200 games in the NRL, with his greatest moment being his hat-trick in Manly's 2008 grand final win.

"A lot of my mates have done it and loved the experience so when the opportunity to give it a shot came up I grabbed it," Robertson said of the chance to playing in England.

"I want to go over there whilst I'm enjoying my football and hopefully with another premiership under my belt."

Manly coach Des Hasler praised Robertson's professional approach.

"From the day he arrived at the club he has been a pleasure to coach," Hasler said.

"He will give tremendous value to any team he plays in."

Having filled in at fullback against Brisbane last weekend, Robertson will revert to his customary position on the left wing when Manly open their finals campaign against North Queensland on Saturday night.

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