On the political left, there's never been more choice. With Labour ending the year more unpopular than ever, new forces are trying to take advantage. Political correspondent Rob Powell tracks the arrival of Jeremy Corbyn and Zarah Sultana's Your Party, and a surging Green Party under new leader Zack Polanski - and the Labour seats that could be at risk if the left-wing vote splits. #skynews #robpowell #politics #starmer #corbyn #sultana #polanski #news 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 Follow us on TikTok: https://www.tiktok.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 Sky News Daily podcast is available for free here: https://podfollow.com/skynewsdaily/ To enquire about licensing Sky News content, you can find more information here: https://news.sky.com/info/library-sales