Britain’s Catherine, Duchess of Cambridge, is shown the Downton Abbey servants bells by actor Brendan Coyle (who plays John Bates) during an official visit to the set of Downton Abbey at Ealing Studios, west of London

Britain’s Catherine, Duchess of Cambridge, is shown the Downton Abbey servants bells by actor Brendan Coyle (who plays John Bates) during an official visit to the set of Downton Abbey at Ealing Studios, west of London

Britain’s Catherine, Duchess of Cambridge, is shown the Downton Abbey servants bells by actor Brendan Coyle (who plays John Bates) during an official visit to the set of Downton Abbey at Ealing Studios, west of London, March 12, 2015. REUTERS/Pool/Chris Jackson (BRITAIN – Tags: ROYALS ENTERTAINMENT)