England have added Bath hooker Rob Webber and Sale prop Henry Thomas to their training squad ahead of Saturday's Test against Australia at Twickenham.
The front row duo have been called up as injury cover for Dylan Hartley and David Wilson, who are struggling to overcome ankle and calf injuries respectively.
England coach Stuart Lancaster will name his team for the clash with the Wallabies on Thursday.
Forwards: Dave Attwood, Dan Cole, Alex Corbisiero, Tom Johnson, Dylan Hartley, Matt Kvesic, Joe Launchbury, Tom Johnson, Courtney Lawes, Joe Marler, Ben Morgan, Geoff Parling, Chris Robshaw, Henry Thomas, Mako Vunipola, Billy Vunipola, Rob Webber, David Wilson, Tom Wood, Tom Youngs.
Backs: Chris Ashton, Luther Burrell, Mike Brown, Freddie Burns, Danny Care, Lee Dickson, Kyle Eastmond, Owen Farrell, Toby Flood, Ben Foden, Alex Goode, Joel Tomkins, Henry Trinder, Billy Twelvetrees, Christian Wade, Marland Yarde, Ben Youngs.