BBC radio presenter Dr Ranj Singh has announced he will be stepping down from the network. The 44-year-old also sensationally quit This Morning three years ago, citing “bullying” as his reason for leaving the ITV show. The BBC Asian Network star presented his own show on the station but on Tuesday informed his followers on social media he’d decided to leave. Singh explained his planned time on the station had ended but didn’t give away too much about his future projects. Singh fronted Motivation, where he shared health tips, motivational suggestions and advice with listeners. The medical profe…