 In 1884 the church was created a cathedral for the new diocese of Nottinghamshire and Derbyshire and its first bishop George Ridding (1828–1904), previously headmaster of Winchester College installed there.Among Christian's best original churches are Holy Trinity, Sunk Island, in the East Riding of Yorkshire (completed in 1877), St Matthew's Church in Cheltenham, Gloucestershire (1878–79), and his masterpiece St Mark's Church, Leicester (1869–72), all cited in his RIBA Royal Gold Medal award of 1887.Holy Trinity displays his most typical red brick lancet style with nave and chancel under a single steep-pitched high roof, a deep apse to the chancel and a bold impressive tower topped by a pyramidal spire.