The Bishop of Leicester has told ITV News that the Government should "not hurry" consultations into laws surrounding same-sex marriage.
Bishop Tim Stevens said that the move could have "unintended consequences" into the relationship between the government and the Church of England.
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He said people have handed over thousands of pounds in good faith, only to find the advert has nothing to do with Mr Lewis or his company.
The memorial service will be attended by Prince Harry and Meghan Markle.
David Browning admits manslaughter by diminished responsibility but denies murder.