All 24 players included in Fabio Capello's squad took part in Tuesday's initial training session at Arsenal's London Colney headquarters.
Fulham striker Bobby Zamora and Bursaspor keeper Scott Carson were back in the international fold after earning recalls from Capello.
But it is the likes of Manchester United duo Danny Welbeck and Phil Jones plus Tottenham's Kyle Walker who will have most to play for in the next few days.
Welbeck is among the candidates to partner his club team-mate Wayne Rooney up front after scoring five goals in six games this season. He missed last month's victories over Bulgaria and Wales with a hamstring injury.
Jones and Walker look to be in contention for the right-back berth in Chris Smalling's absence with a groin injury, after he started in the role against Bulgaria and Wales.
Walker impressed during the summer European Under-21 Championships and netted the winner for Spurs against Arsenal in Sunday's north London derby.
England need only a point in Montenegro to ensure their automatic qualification for next summer's finals in Poland and Ukraine.