Wales Under 21 have lost Cardiff outside half Nicky Robinson to the senior Wales replacements bench at Twickenham following the injury to Stephen Jones.
And with the IRB Young Player of the Year, Swansea's Gavin Henson, ruled out with an injury, it means Newport's Michael Hook will win his first Under 21 cap in the No 10 jersey against England Under 21 at Newbury tonight (kick-off 7.30pm).
Wales will be seeking their fourth successive victory over England in the Six Nations Under 21 Championship. They also beat them in Argentina in an eight-team tournament in 2000.
England's only victory against Wales was in their first meeting in 1998 at
Worcester, winning 46-7.
In their Championship clashes, Wales won 36-21 at Neath in 1999, 15-12 at New Brighton in 2000 and 27-12 at Pontypridd last year.
After winning in Ireland and losing at home to France, Wales defeated Italy at Bridgend by 65-12. They have made a number of changes from that game, including bringing in Wales A No 8 Andrew Powell.
ENGLAND UNDER 21 (v Wales Under 21)
Jon Goodridge (Gloucester); Anthony Elliott (Sale Sharks), Adam Billig (Leicester Tigers), Alex Crockett (Bath), Tom Voyce (Bath); Oliver Barkley (Bath), Ian Vass (Northampton Saints); Michael Holford (Leicester Tigers), Jonathan Roddam (NEC Harlequins), Mark Irish (Gloucester),
Stuart Hooper (Saracens), Martin Purdy (London Wasps), Chris Morgan (Bristol Shoguns), James Scaysbrook (Bath), Mark Soden (Northampton Saints, Captain)
Replacements: Alex Page (London Wasps),
Andy Higgins (Bristol Shoguns), Nick Cox (Gloucester), James Buckland (Northampton Saints), Alistair McKenzie (London Wasps), James Hamilton (Leicester Tigers), Ian Clarke (Leeds Tykes)
WALES UNDER 21
Gareth Swales (Swansea); James Strong (London Welsh), Hal Luscombe (Newport), Matthew Brayley (Swansea, capt), Liam Roberts (Cardiff); Michael Hook (Newport), Michael Phillips (Llanelli);
Paul James (Neath), Adam Matthews (Neath), Adam Jones (Neath), Luke
Tait (Cardiff), Ryan Jones (UWIC), Rhys Williams (Ebbw Vale), Gareth Williams (Llanelli), Andrew Powell (Newport).
Replacements: Matthew Miles (Northampton Saints), Phil John (Llanelli), Ceiron Jones (Llanelli), Nathan Brew (Newport), Rhys Jones
(Newport), Chris Miller (Cardiff), Dafydd Lewis (London Wasps).
Beating Merthyr has boosted Carmarthen Quins hopes of reaching a top eight spot in the Principality Premiership. Quins captain Haydn Pugh is delighted with his team's progress and is determined that everyone from the Under 6s through to the senior team, enjoys the ride.
When the Wales squad were asked to nominate individuals who played a big part in their early playing days, Wales and Dragons full back and wing Hallam Amos thought of his former Monmouth School rugby coach John Bevan.
Sam Cross and Luke Treharne have been named as co-captains of the Wales Sevens side as head coach Gareth Williams names his 12-man squad to play in the first leg of the HSBC World Series in Dubai next weekend.
Bedwas head coach Steve Law and players Nicky Griffiths and Alun Rees extol the virtues of the close knit club as they prepare to host third place RGC 1404 - who are one place head of them on the Principality Premiership points table - on Saturday.
Many of the Wales squad have said Diolch (thank you) to someone who played an important part in their early playing days by nominating them to be invited to the Wales v South Africa match. One person, Gowerton Comprehensive geography teacher Mr Dean Mason was nominated by two of his former pupils, Dan Biggar and Sam Davies.
The second WRU disability rugby pilot has been delivered, this time in Caerphilly schools, culminating in a festival at the Caerphilly Centre of Sporting Excellence, Ystrad Mynach tomorrow. Plans are in place to set up a Disability Rugby Club in Newbridge to provide long-term playing opportunities.
WRU TV: Hear from inside the Wales camp as Neil Jenkins discusses this weekend's clash with South Africa and how the squad are looking to put in a strong performance to round of the 2016 Under Armour Series