Gloucester fly-half Freddie Burns and centre Billy Twelvetrees have been added to the England squad ahead of the QBE autumn international series.
Burns has been called up to replace Harlequins centre Jordan Turner-Hall, who is suffering from an inflamed knee.
Twelvetrees also linked up with the England squad at Pennyhill Park to provide temporary injury cover for Jonathan Joseph, the London Irish centre who is carrying an ankle injury.
A total of 36 players were scheduled to convene on Sunday night, including Dylan Hartley and Courtney Lawes who will have their respective knee injuries assessed by the England medics.
England play Fiji at Twickenham on Saturday and then face Australia, South Africa and New Zealand in a challenging autumn campaign.