Original sentence: In November 2006 though, after Irving's release, the far-right British National Party, prevented her from addressing its Croydon branch on Irving's situation on the grounds that "her presence would put the BNP in a bad light"
Edited sentence: In November 2006 though, while Irving was in prison, the far-right British National Party, prevented her from addressing its Croydon branch on Irving's situation on the grounds that "her presence would put the BNP in a bad light"