Joan Bakewell presents Portrait Artist of the Year, this week's celebrity sitters feature James Norton, Raleigh Ritchie and Lesley Manville. Tuesday 7th February at 8pm on Sky Arts. Joan will also be presenting a film for the Secrets of the National Trust, following some of the priceless paintings from Knole to a leading art conservation studio on Tuesday 7th February at 9pm on Channel 5.