George Russell confirms he's staying in F3 next year:
http://www.autosport.com/news/report.php/id/121736
Interesting that it seems there's been some talks with Prema - he was due to race for them in Formula Renault 2.0 ALPS last year but made a really late switch to Koiranen GP instead. At the time his management said there were "absolutely no problems" between them and Prema, but I've always found that slightly odd and have wondered what really went on.
If I were Prema though I'd be biting there hand off to try and get Russell in alongside Stroll...