The 24-year-old, who first joined the Quins academy at the age of 13, has made 17 senior appearances for the London club since debuting against London Irish in 2022.
A former England U18s international, Trenholm has also spent time sharpening his skills in the Championship with London Scottish, and impressed on the global stage with five appearances for England Sevens and two for Great Britain in the World Sevens Series.
Standing at 190cm and weighing in at 112kg, Trenholm is a powerful and dynamic presence in the back-row and adds real athleticism to George Skivington’s growing squad.
?️ Gloucester’s Director of Rugby, George Skivington, said: “Will is a terrific athlete, and that’s evident by the fact he’s played on the World Sevens circuit. “We feel like his energy and physical attributes in particular will really suit the style we’re playing, and we’re looking forward to welcoming him here in the summer.”
?️ Trenholm added: “Having been at Harlequins for so long, it’s a big change for me, but I’m really excited to make the move. “Gloucester are building something special and playing an exciting brand of rugby – I’m buzzing to get stuck in. “Everyone knows how iconic The Shed is, and I can’t wait to play in front of those fans.”
Who will make the 2025 British & Irish Lions squad? Latest odds
While the final tour squad remains months away, these latest odds from the bookmakers offer the strongest hints yet of who’s expected to don the famous red jersey.
Duhan van der Merwe (1/16) is about as nailed-on as it gets – the Scotland powerhouse leads the market by some distance. He’s joined by two key Irish threats: James Lowe (1/8) and Hugo Keenan (1/5), both firm favourites.
England’s Tommy Freeman (4/9) continues his upward trajectory, while Blair Kinghorn (8/11) brings utility value and flair. Don’t rule out Darcy Graham (2/1) – the pocket rocket could be a dark horse.
? CENTRES: Aki and Jones in Pole Position
No surprises here. Bundee Aki (1/5) has been sensational and looks a shoo-in, while Huw Jones (1/4) is Scotland's best bet in midfield.
Scotland’s dynamic duo of Sione Tuipulotu (2/7) and Huw Jones (1/4) are also on track for selection, while Ireland’s Robbie Henshaw (8/11) must prove his fitness to stay in contention.
? FLY-HALVES: Finn’s to Lose?
Finn Russell (1/10) has the number 10 jersey in his grasp – and the bookies agree. England’s Fin Smith (8/15) is rising fast, while Marcus Smith (8/11) just edges Ireland’s Sam Prendergast, who drops out of the market in this latest update.
? NINES: Neck-and-Neck
It’s tight at scrum-half. Ireland’s Jamison Gibson-Park (8/11) leads the charge, but Alex Mitchell (11/10) and Tomos Williams (11/10) are breathing down his neck. With form fluctuating, this one’s still wide open.
? PROPS: Irish Domination
There’s no ignoring Tadhg Furlong (1/8) and Andrew Porter (1/7) – both virtually guaranteed. Zander Fagerson (4/11)is Scotland’s main man, while England’s Ellis Genge (4/6) and Fin Baxter (5/6) are right in the mix.
Pierre Schoeman (5/4) is hanging on, but might need a big end to the season.
? HOOKERS: Sheehan Out in Front
Dan Sheehan (1/10) is the clear frontrunner, but Dewi Lake (8/15) is hot on his heels. England’s Luke Cowan-Dickie (6/5) is back in the mix, but will need to stay fit to seal his spot.
? LOCKS: Itoje the Banker
Maro Itoje (1/33) is the biggest lock on the list (pun fully intended). He’s joined by Tadhg Beirne (1/10) and rising Irish star Joe McCarthy (4/6).
England’s Ollie Chessum (8/11) is in the hunt, and George Martin (11/10) isn’t far behind either.
? BACK-ROW: Doris and Earl Lead the Charge
Ireland’s Caelan Doris (1/5) and England’s Ben Earl (1/5) are leading the way. Former World Player of the Year Josh van der Flier (1/3) is another certainty.
England’s Tom Curry (8/15) is close to sealing a spot, while Jack Morgan (4/6) and Jack Willis (6/4) remain outside contenders.
? PROPOSED 2025 BRITISH & IRISH LIONS SQUAD (36)
Back-Three (6): Duhan van der Merwe (Scotland) - 1/16 James Lowe (Ireland) - 1/8 Hugo Keenan (Ireland) - 1/5 Tommy Freeman (England) - 4/9 Blair Kinghorn (Scotland) - 8/11 Darcy Graham (Scotland) - 2/1
Hookers (3): Dan Sheehan (Ireland) - 1/10 Dewi Lake (Wales) - 8/15 Luke Cowan-Dickie (England) - 6/5
Locks (5): Maro Itoje (England) - 1/33 Tadhg Beirne (Ireland) - 1/10 Joe McCarthy (Ireland) - 4/6 Ollie Chessum (England) - 8/11 George Martin (England) - 11/10
Back-Row (6): Caelan Doris (Ireland) - 1/5 Ben Earl (England) - 1/5 Josh van der Flier (Ireland) - 1/3 Tom Curry (England) - 8/15 Jack Morgan (Wales) - 4/6 Jack Willis (England) - 6/4
Harlequins can confirm Will Trenholm will depart the Club at the end of the 2024/25 season to join Gloucester Rugby.
The Club would like to thank Will for his contribution to Harlequins throughout his time in the Quarters.
🗞️ quins.co.uk/Article/trenho…#COYQ