The Harlequins duo, who are both considered 'apprentice' players by Eddie Jones, are among those added to the 24 players who were involved in the snow-affected training camps staged across the country last week.
Elliot Daly is present as he continues his bid to prove his fitness after suffering ankle and calf injuries that have prevented his involvement in the Championship to date.
England training squad:
Backs: M Brown (Harlequins), D Care (Harlequins), E Daly (Wasps), O Farrell (Saracens), G Ford (Leicester), G Ibitoye (Harlequins), J Joseph (Bath), A Lozowski (Saracens), J May (Leicester), J Nowell (Exeter), M Smith (Harlequins), D Solomona (Sale), B Te'o (Worcester), A Watson (Bath), R Wigglesworth (Saracens)
Forwards: D Cole (Leicester), C Ewels (Bath), J George (Saracens), D Hartley (Northampton), J Haskell (Wasps), N Hughes (Wasps), M Itoje (Saracens), G Kruis (Saracens), C Lawes (Northampton), J Launchbury (Wasps), J Marler (Harlequins), Z Mercer (Bath), C Robshaw (Harlequins), S Simmonds (Exeter), K Sinckler (Harlequins), S Underhill (Bath), M Vunipola (Saracens), H Williams (Exeter).
