The Bottom Line

How big is the market for halal - not just food, but holidays, fashion and music too? Muslim consumers - and how best to serve them - are the topics this week. Evan Davis talks to entrepreneurs who think they know the answer and asks how much can established companies learn from them.Guests :Shelina Janmohamed, Ogilvy Noor Elnur Seyidli, HalalBooking.com Shazia Saleem, ieat foodsProducer : Rosamund Jones.