From my save, with England leagues on Normal detail, and Scotland, German, Italian and Spain leagues on basic detail, heres a list of the CL and UEFA Cup winners.
CL
06 - Real Madrid
07 - Barcelona
08 - Bayern
09 - Bayern
10 - Inter
11 - Chelsea
12 - Bayern
13 - Arsenal
14 - Roma
15 - Roma
16 - Arsenal
17 - Inter
18 - Milan
So that's 5x Italian winners, 3x German winners, 3x English winners and 2x Spanish winners.
Uefa Cup
06 - Villareal
07 - Sevilla
08 - Liverpool
09 - Lazio
10 - Barcelona
11 - Benfica
12 - Parma
13 - Inter
14 - Athletic Bilbao
15 - Valencia
16 - Leverkusen
17 - Tottenham
18 - Arsenal (That was me winning it for them

)
And that equates to 5x Spanish winners, 3x Italian winners, 3x English winners, 1x German winners and 1x Portuguese winners.
Therefore, I have just proved that there is no such thing as an English bias.