Complex sentence: A number of other senior Christian Heritage members, led by a former Deputy Leader, Geoff Hounsell, also resigned or were expelled from the party and joined the Christian Democrats following their unsuccessful attempt to have Christian Heritage agree to a merger with Christian Democrats.
Split into simpler sentences: A number of other senior Christian Heritage members, led by a former Deputy Leader, Geoff Hounsell, also resigned; and the party expelled others. Ex-members joined the Christian Democrats following an unsuccessful attempt to have Christian Heritage agree to a merger with Christian Democrats.