Thacker and club colleague Harry Rudkin started the opening game of the tour as England beat Wales last Saturday. Tigers centre George Catchpole is also among the touring party.
Coach John Fletcher has made 10 changes to the team that beat Wales 28-25 in the opening game.
England Under-18 (v France)
15 Howard Packman (Moulton College) (Northampton Saints)
14 Zach Kibirige (Yarm School) (Newcastle Falcons)
13 Nick Tompkins (Oaklands College) (Saracens)
12 Tom Stephenson (Moulton College) (Northampton Saints) (c)
11 Joshua Watkins (Bromsgrove School) (Worcester Warriors)
10 Sam Olver (Oundle School) (Northampton Saints)
9 Ollie Claxton (Adams Grammar School) (Unattached)
1 Alex Lundberg (Hampton) (London Wasps)
2 Sam James (Bishops Stortford) (Saracens)
3 Biyi Alo (Haileybury College) (Saracens)
4 Jake Oldaker (Wellington College) (Bath Rugby)
5 David Hughes (Twyford C&E High School) (London Wasps)
6 Maro Itoje (Harrow School) (Saracens)
7 Steve Uren (Filton College) (Bristol Rugby)
8 Joel Conlon (Ivybridge Community College) (Exeter Chiefs)
Replacements
16 Gus Jones (Eton College) (London Wasps)
17 Harry Thacker (Leicester Grammar) (Leicester Tigers)
18 Charlie Ewels (Bryanston School) (Bath Rugby)
19 Danny Hobbs-Awoyemi (Moulton College) (Northampton Saints)
20 Callum Braley (Hartpury College) (Bristol Rugby)
21 Nick Carpenter (Filton College) (Bristol Rugby)
22 Billy Burns (Hartpury College) (Gloucester Rugby)
