By Anshel Pfeffer, Haaretz Correspondent, and Saul Sadka: U.K. Jewish school sued for barring pupil over conversion
Talkback
Title:Religion or Politics?
Name:oh well
City: State:
"According to the Talmud, if a kohen marries in disregard of the above prohibitions [marry a convert etc.], his marriage is still effective. Any children born of the union are legitimate and not mamzer. However, these children are termed chalal ("defiled") and lose their kohen status permanently." http://en.wikipedia.org/wiki/Kohen

Anyways it is probably only a political game and not a question of religion.