It was the moment many people have been waiting for since the start of the Conservative leadership contest. Boris Johnson, the front-runner to be the next Prime Minister, answering questions on live television. He joined the rest of the candidates to debate Brexit, tax and a possible election. But it was Mr Johnson's previous loose language that brought the moment of the night - as he apologised for causing offence. Sky's political editor Beth Rigby reports. SUBSCRIBE to our YouTube channel for more videos: http://www.youtube.com/skynews Follow us on Twitter: https://twitter.com/skynews Like us on Facebook: https://www.facebook.com/skynews Follow us on Instagram: https://www.instagram.com/skynews For more content go to http://news.sky.com and download our apps: Apple: https://itunes.apple.com/gb/app/sky-news/id316391924?mt=8 Android https://play.google.com/store/apps/details?id=com.bskyb.skynews.android&hl=en_GB