Complex sentence: In 2003, while continuing her television work, Nikki began developing a career in radio appearing on LBC and BBC Radio 4, she became a regular stand-in presenter on the BBC Asian Network, most notably for the Sonia Deol show.
Split into simpler sentences: In 2003, while continuing her television work, Nikki began developing a career in radio. Along with appearances on LBC and BBC Radio 4, she became a regular stand-in presenter for the BBC Asian Network, most notably for the Sonia Deol show.