In the last of our four BBC Radio 3 lunchtime recitals broadcast at Hay Festival this week, presented by BBC Radio 3 presenter Sarah Walker, Ruby Hughes (soprano) and Huw Watkins (piano) play a programme featuring a selection of popular songs by Dvořák and folksongs by Britten, as well as Echo by the pianist Huw Watkins and the UK première of four Romances by Kashperova.