Saints centre Luther Burrell is in contention to make his first England appearance of the autumn after being retained for Saturday’s clash with Samoa.
Burrell, whose hand injury ruled him out of the opening Test against New Zealand, returned to action in Saints’ 24-18 defeat to Exeter last Friday.
That saw him miss the following day’s game against South Africa at Twickenham, but he could now get a chance to shine against Samoa this weekend.
England boss Stuart Lancaster has kept 28 men at Pennyhill Park for training ahead of the match, with Calum Clark, Dylan Hartley, Courtney Lawes and Tom Wood also in camp.
But there is no place for Stephen Myler or Lee Dickson, who will both be available for Saints’ Aviva Premiership trip to Saracens on Sunday.
“We have narrowed the group to give us more focus in training,” said England head coach Stuart Lancaster.
“It’s good to have Luther back in camp after recovering from his hand injury and we’ll see how he gets on in training this week.”
England’s 28-man training squad: Marler (Harlequins), Mullan (Wasps), Brookes (Newcastle Falcons), Wilson (Bath), Hartley (Saints), Webber (Bath), Attwood (Bath), Kruis (Saracens), Lawes (Saints), Clark (Saints), Haskell (Wasps), Morgan (Gloucester), Robshaw (Harlequins, captain), B Vunipola (Saracens), Wood (Saints), Care (Harlequins), B Youngs (Leicester Tigers), Wigglesworth (Saracens), Barritt (Saracens), Burrell (Saints), Eastmond (Bath), Farrell (Saracens), Ford (Bath), Twelvetrees (Gloucester), Brown (Harlequins), May (Gloucester), Watson (Bath), Yarde (Harlequins)