Harlequins prop Darryl Marfo has called time on a 10-year spell at the club to join Championship-bound London Welsh.

The 24-year-old former Battersea Ironsides youngster oined the club's Elite Player Development Group as a 14-year-old and has made 32 senior appearances for the club since his debut in 2011 - lifting the LV= Cup and A League titles in the process.

Quins director of rugby O'Shea insisted he goes with best wishes.

“Everyone at Harlequins is delighted Darryl has got this opportunity," he said.

"During his 10 years associated with the club, he has made a huge contribution.

"We would like to wish him well with London Welsh as he begins the next stage of his rugby career."

Marfo is one of three new faces Welsh have confirmed as signed up for next season's tilt at a swift return to the top flight.

Disgraced former Quins academy hooker Harry Allen - who signed for London Irish at the start of this year after a 12-month ban for cocaine abuse saw him kicked out of the Stoop - has penned a permanent deal after joining Welsh on a temporary contract earlier this year.

And England age group international scrum half Ryan Glynn has agreed a switch from Jersey, having started his career at Sale Sharks and then Northampton Saints, where he also spent three seasons on dual registration with Moseley.

Welsh director of rugby Steve Lewis added: "Darryl and Harry are two highly promising young front row forwards, who have also gained top flight experience.

"They will both be excellent additions to our front row next season, and help to provide stiff competition at loosehead and hooker.

“Darryl is a very talented, mobile and powerful loosehead prop with an excellent work ethic. Harry is a dynamic, all-action player and both will push hard for starting places.

“Ryan has all the core skills a scrum half needs. He is a particularly lively player with the ability to threaten the fringes and keep the defence honest.

"His regular game time at Moseley and Jersey has helped him develop as a player and given him invaluable experience. He will provide good competition for us at number nine.”

Re-signed for 2015/16: Seb Jewell, Alan Awcock, Nic Reynolds, James Lewis, Will Robinson, Nathan Trevett, Koree Britton, Nathan Morris, Ben Cooper, Olly Barkley, Rob Lewis, Ben Pienaar, Chris Elder, Matt Corker and Darren Waters.

Already under contract for 2015/16: Richard Thorpe, Ben West, Ricky Reeves, Jack Gilding, Eddie Aholelei, Josh McNally and Jesse Liston.

New signings: Josh Drauniniu (Worcester Warriors), Martyn Thomas (Wasps), Guy Armitage (London Irish), Kieran Murphy (Brive), Ryan Hodson (Jersey), Gus Jones (Wasps), Will Skuse (Bath Rugby), Joe Carlisle (Treviso), Josh Davies (Plymouth Albion), Darryl Marfo (Harlequins), Ryan Glynn (Jersey) and Harry Allen.