The tomb of Bishop Wilberforce is situated in the South Transept of Winchester Cathedral and dates to 1878. It is the work of H.H. Armstead (sculptor, 1828-1905) and Sir George Scott (architect 1811-1878).
From The Victorian Web:
The third son of the famous abolitionist, Bishop Wilberforce had served as Archdeacon of Surrey and Dean of Westminster before becoming [...]