London Welsh have signed Billy Moss on a season-long dual-registration loan deal from Bath.
Moss, 23, who plays on both sides of the scrum, came through the ranks at The Rec, before breaking into the Championship last season with Bristol.
He said: "My target next season is to be London Welsh's first choice loosehead but I know that may take a little bit of time.
"The fact it's a season long loan makes me think London Welsh is now my team."
He added: "I really enjoyed playing in the Championship with Bristol. I found it challenging at times but satisfying. The standard in the Championship was very high but I never expected it to be anything else."
Moss has represented England at Under-18 and Under-19 levels and was part of the Under-20 side that reached the Under-20 IRB Junior World Championship final in Wales in 2008.