Gay marriage: Roman Catholic archbishops step up fight

The Roman Catholic Church in England and Wales is intensifying its campaign against the government's plan to legalise same-sex marriage.

In a letter to be read in 2,500 parish churches later, the Church's two most senior archbishops say the change would reduce the significance of marriage.

The letter says Roman Catholics have a duty to make sure it does not happen.

The government wants to introduce gay marriage by 2015, but says churches would not have to perform weddings.

Robert Pigott reports.