England have added Gloucester back duo Billy Twelvetrees and Freddie Burns to their squad ahead of the November international Test series.
Burns replaces Jordan Turner-Hall, who will stay at Harlequins for treatment on an inflamed knee, while Twelvetrees comes in as temporary injury cover for London Irish's Jonathan Joseph (ankle).
36 players reported to the team base on Sunday.
"Freddie has been playing well in the Aviva Premiership and, with Jordan needing to stay at Harlequins for treatment, we are keen to have a look at him. JJ is continuing his recovery from an ankle injury and this is a good chance to get Billy in for training," said head coach Stuart Lancaster.
"As last week, George Robson and David Paice come in as an injury replacements for Courtney Lawes and Dylan Hartley. Both will be assessed and treated in camp and it is important that they stay with the squad as much as possible.
"We had a productive week at St George's Park and got a lot of work done. Now we are back at Pennyhill we will sharpen our focus towards Fiji on Saturday."