Picks from across the week on In Tune with Sean Rafferty. His guests this week are violinist Sergej Krylov playing Bach and Paganini. Pianist Jeremy Denk who plays Prokofiev and Beethoven. We meet two of the Nuns from the Guildhall School Opera department’s award-winning presentation of Poulenc’s Les Dialogues des Carmelites. And a visit to the Tower of London in the company of organist and Master of Music of the Chapels Royal, Colm Carey.