The Cathedral Church of St John the Evangelist is a Roman Catholic cathedral in Portsmouth, England. It is the mother church of the Portsmouth Diocese and seat of the Bishop of Portsmouth, currently Bishop Philip Egan. The diocese is within the Metropolitan Province of Southwark. It includes the whole of Hampshire, the Isle of Wight, and the Channel Islands, and also parts of Oxfordshire, Berkshir
e, and Dorset, stretching from Abingdon, Oxfordshire, in the north to the island of Jersey (near the French coast) in the south.