England have added front row forwards Rob Webber and Henry Thomas to their squad for Saturday's opening autumn Test with Australia at Twickenham.
Bath hooker Webber, 27, is included as injury cover for Dylan Hartley who has been troubled by an ankle problem.
Sale prop Thomas, 21, is brought in as Bath's David Wilson has a calf injury.
Head coach Stuart Lancaster will announce his team on Thursday. England also play home Tests with Argentina and New Zealand at Twickenham next month.
Both Webber and Thomas toured Uruguay and Argentina with England in June and are promoted from the England Saxons.
Webber scored in the 51-25 second Test victory against the Pumas in Buenos Aires, while former England Under-20 forward Thomas made his Test debut as a replacement in the 32-3 win in the first Test in Salta.
Having secured their first away series success against Argentina for 32 years, England tackle the Pumas again on 9 November before completing their autumn programme with a match against the All Blacks a week later.
It will be Argentina's first match at Twickenham since 2009 when a late try from Matt Banahan helped England to a 16-9 win, while world champions New Zealand suffered a surprise 38-21 defeat against Lancaster's side in last year's autumn series.
Forwards: David Attwood (Bath Rugby), Dan Cole (Leicester Tigers), Alex Corbisiero (Northampton Saints), Tom Johnson (Exeter Chiefs), Dylan Hartley (Northampton Saints), Matt Kvesic (Gloucester Rugby), Joe Launchbury (London Wasps), Courtney Lawes (Northampton Saints), Joe Marler (Harlequins), Ben Morgan (Gloucester Rugby), Geoff Parling (Leicester Tigers), Chris Robshaw (Harlequins), Henry Thomas (Sale Sharks), Billy Vunipola (Saracens), Mako Vunipola (Saracens), Rob Webber (Bath Rugby), David Wilson (Bath Rugby), Tom Wood (Northampton Saints), Tom Youngs (Leicester Tigers)
Backs: Chris Ashton (Saracens), Mike Brown (Harlequins), Freddie Burns (Gloucester Rugby), Luther Burrell (Northampton Saints), Danny Care (Harlequins), Lee Dickson (Northampton Saints), Kyle Eastmond (Bath Rugby), Owen Farrell (Saracens), Toby Flood (Leicester Tigers), Ben Foden (Northampton Saints), Alex Goode (Saracens), Henry Trinder (Gloucester Rugby), Joel Tomkins (Saracens), Billy Twelvetrees (Gloucester Rugby), Christian Wade (London Wasps), Marland Yarde (London Irish), Ben Youngs (Leicester Tigers)