Liberal Judaism describe Chief Rabbi Lord Sacks’ opposition to marriage equality as ‘regrettable’:
http://www.pinknews.co.uk/2012/06/20/chief-rabbis-opposition-to-marriage-equality-and-civil-partnerships-regrettable/

Mormons claims that equal marriage would have ‘negative implications’ for the UK:
http://www.pinknews.co.uk/2012/06/20/mormons-say-equal-marriage-would-have-negative-implications-for-uk/