Both Westminster Cathedral, with its chapel of St Patrick and All the Saints of Ireland, and St George’s Cathedral Southwark (Letters, 26 April), would have made ­appropriate visits for the president of Ireland during his state visit to Britain, had the Irish Embassy (London) and the Department of Foreign Affairs (Dublin) so advised. The Queen’s historic visit to Ireland in 2011 ­similarly bypassed the Catholic Church, whereas her grandfather in 1911 met all the bishops, and