The Bishop of Leicester,Rt Rev Tim Stevens, has said that gay marriage goes a step beyond what is really needed at the moment because it suggests there is complete uniformity between men and women in terms of the kinds of relationship that they make.
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Among those expected to attend the ceremony will be former US President Bill Clinton and ex-Northern Ireland first minister Peter Robinson.
Five people have been killed and 40 injured after a car and knife attack in London on Wednesday.
A wet, wintry night in places with rain and hill snow slow to move away from southern Scotland and northern England.