London - Scotland flyhalf Ruaridh Jackson will leave Wasps for English Premiership rivals Harlequins at the end of the season, his current club announced on Tuesday.
Jackson, 28, has made 16 appearances for Wasps this season after recovering from an ankle ligament injury and won his 16th Scotland cap during this year's Six Nations.
"It was an extremely tough decision to leave Wasps, having loved my two years here," said Jackson, who signed from Glasgow in 2014.
"It's a club on the up, playing great rugby, but I feel this move is the best decision for my career."
Wasps director of rugby Dai Young told the club website: "Ruaridh is a very talented player and we were obviously keen to keep him.
"He was certainly part of our long-term plans, but we appreciate he was keen to secure the most game-time possible and he felt this would be elsewhere given the 10s we will have here at Wasps next season.
"We will part on good terms and wish him the very best at Quins next season."