Wikipedia's list seems more up to date than that on mcfc.co.uk....
1 Republic of Ireland GK Shay Given (vice-captain)
2 England DF Micah Richards
3 England DF Wayne Bridge
4 England DF Nedum Onuoha
5 Argentina DF Pablo Zabaleta
6 England MF Michael Johnson
7 Republic of Ireland MF Stephen Ireland
8 England MF Shaun Wright-Phillips
11 England MF Adam Johnson
12 England GK Stuart Taylor
14 Paraguay FW Roque Santa Cruz
15 Spain DF Javier Garrido
17 Germany DF Jérôme Boateng
18 England MF Gareth Barry
19 England DF Joleon Lescott
20 Ecuador FW Felipe Caicedo
21 Spain MF David Silva
24 France MF Patrick Vieira
25 Togo FW Emmanuel Adebayor
26 Colombia GK David González
28 Côte d'Ivoire DF Kolo Touré (captain)
29 Nigeria MF Kelvin Etuhu
30 England DF Shaleum Logan
32 Argentina FW Carlos Tévez
33 Belgium MF Vincent Kompany
34 Netherlands MF Nigel de Jong
36 England DF Javan Vidal
39 Wales FW Craig Bellamy
40 Slovakia MF Vladimír Weiss
42 Côte d'Ivoire MF Yaya Touré
44 Belgium DF Dedryck Boyata
45 Republic of Ireland DF Greg Cunningham
48 Norway MF Abdisalam Ibrahim
52 England FW Alex Nimely
— England GK Joe Hart
— Brazil FW Jô
— Serbia DF Aleksandar Kolarov
The minimum 8 trained in England rule covers Richards, Bridge, Michael Johnson, Onouha, Ireland, SWP, Adam Johnson, Taylor, Barry, Lescott, Etuhu, Logan, Vidal, Bellamy, Weiss, Cunningham, Nimely, Hart, and possibly Boyata and Ibrahim (depends on defining trained).
Foreign players certs for the squad are Given, Zabaleta, Boateng, Silva, Vieira, Adebayor, Toure, Toure, Tevez, Kompany, de Jong, Kolarov. Then Garrido and Santa Cruz. Jo maybe. Total 15.
There's obviously at least 8 in the top list who will be in the squad - Richards, Bridge, Onouha, Ireland, SWP, Adam Johnson, Taylor, Barry, Lescott, Etuhu, Bellamy, Hart, Boyata and Ibrahim. Total 14.
So (unless the lists for PL and Europe are different) 4 other names to leave out, but can be from either list. Adjust for more ins and outs...