Launchbury is retained as part of the EPS Squad and is included in the 6 Nations squad while Mullan, named in the England Saxons group, is included as an injury replacement in the RBS 6 Nations training squad that will meet up at Pennyhill Park on Monday, January 20.
England begin their RBS 6 Nations campaign on Saturday 1 February against France at the Stade de France.
Christian Wade is also retained in the EPS squad while he continues his rehab from the foot injury sustained against London Irish.
Wasps also have strong representation in the England Saxons group with James Haskell, Elliot Daly and Joe Simpson all named alongside Mullan.
The Saxons have two scheduled fixtures against the O2 Ireland Wolfhounds at Kingsholm on Saturday 25 January and then against Scotland A at Scotstoun on Friday 31 January.
Wasps have two representatives in the England U20s squad, also named today. Gus Jones and Alex Lundberg are both included in the 32 man squad who begin their Six Nations fixtures on Friday 31 January against France Under 20s at the Stade Leo Lagrange.
Saturday, February 1: France v England, Stade de France (5pm, live on BBC Sport)
Saturday, February 8: Scotland v England, Murrayfield (5pm, live on BBC Sport)
Saturday, February 22: England v Ireland, Twickenham (4pm, live on BBC Sport)
Sunday, March 9: England v Wales, Twickenham (3pm, live on BBC Sport)
Saturday, March 15: England v Italy, Stadio Olimpico (12.30pm, live on BBC)
Saturday, January 25: England Saxons v O2 Ireland Wolfhounds, Kingsholm, Gloucester (5pm, live on Sky Sports)
Friday, January 31: Scotland A v England Saxons, Scotstoun, Glasgow (7.30pm)
Friday, January 31: France Under-20s v England Under-20, Stade Leo Lagrange, Paris (7.55pm)
Friday, February 7: Scotland Under-20s v England Under-20s, Netherdale, Galashiels (7.30pm)
Saturday, February 22: England Under-20s v Ireland Under-20s, Franklin’s Gardens, Northampton (6.15pm, live on Sky Sports)
Friday March 7: England Under-20s v Wales Under-20s, Kingston Park, Newcastle (7.45pm, live on Sky Sports)
Friday March 14: Italy Under-20s v England Under-20s, Campo Comunale La Colombera, Brescia (kick off, tbc)