A Welsh based business owner has pledged to sing his favourite song live on social media in order to raise money for the charity Teenage Cancer Trust. Brian Critcher founder of Cardiff based fruit company Agri SGJ and his wife Carol are participating in the ‘Can you Hear the People Sing’ challenge. The Facebook challenge, which has been established by dedicated Teenage Cancer Trust fundraiser Mike O’Leary, has already raised £15,000, and he, along with Brian and Carol are calling…