Mealor's motet, a setting of Now Sleeps the Crimson Petal (rearranged as "Ubi Caritas et Amor)," was commissioned by Prince William for his marriage to Catherine Middleton at Westminster Abbey on 29 April 2011, when it was sung by the Choirs of Westminster Abbey and Her Majesty's Chapel Royal conducted by James O'Donnell. Later that year, Mealor was commissioned to write the music for "Wherever You Are", a song setting a text compiled from letters written to British Army military personnel deployed on active service in the Afghanistan War by their wives or partners, as part of the BBC Two television series "The Choir: Military Wives". The single, released on 19 December 2011, became the 2011 Christmas number one in the UK Singles Chart and raised money for military charities. In the 2012 Classic FM Hall of Fame, he was voted the 'nation's favourite living composer' and succeeded in achieving the highest placing of any new entry in the history of the Hall of Fame with "Wherever You Are" charting at No 5.