Tim Farron has refused to say whether he thinks gay sex is a sin.
The Liberal Democrat leader and devout Christian has previously stressed he does not believe being gay is a sin, but has been challenged for failing to fully answer questions about his views on gay sex.
When asked if he believed having gay sex is a sin by Sky News journalist Darren McCaffrey, Mr Farron said: "Look, I'm not going to give you an answer to that question.
“One’s personal faith is one’s personal faith. What counts is your actions and beliefs in politics.”
The Lib Dem leader went on to say he had a "track record" of campaigning in favour of LGBT rights for over 30 years, the Huffington Post reported.
He said he “supports people’s right to love who they love, to be who they are, to marry who they marry.”
He added: “I am passionate about LGBT issues, it has been the heart of our party’s programme for decades and it will continue under my leadership to be.”
Mr Farron's failure to answer the question was branded "offensive" by Labour MP Liz Kendall when she appeared on ITV's Peston On Sunday.
"I think a lot of people will be appalled that he couldn't bring himself to say that gay sex is not a sin," Ms Kendall said.
"I think that's pretty offensive and will rightly anger a lot of people. I think that was a really terrible interview to not be able to bring himself to say that."