Sale Sharks prop Thomas will train with the rest of the England squad at Pennyhill Park ahead of Saturday's match while Corbisiero remains at London Irish for treatment on a knee injury, the Rugby Football Union (RFU) have confirmed in a statement.
Harlequins' winger Ugo Monye has also been drafted into the 33-man training squad as Freddie Burns remains at Gloucester for treatment, also with a knee problem.
Meanwhile, the RFU also said Shaun Knight has withdrawn from the England Saxons squad as he, too, must return to Gloucester due to a knee injury.
The Saxons convene in Newcastle on Monday morning ahead of their match with Scotland A at Kingston Park on Friday.
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