Passage: At the end of the war in Europe, on Victory in Europe Day, Princesses Elizabeth and Margaret mingled anonymously with the celebratory crowds in the streets of London. Elizabeth later said in a rare interview, "We asked my parents if we could go out and see for ourselves. I remember we were terrified of being recognised ... I remember lines of unknown people linking arms and walking down Whitehall, all of us just swept along on a tide of happiness and relief."During the war, plans were drawn up to quell Welsh nationalism by affiliating Elizabeth more closely with Wales. Proposals, such as appointing her Constable of Caernarfon Castle or a patron of Urdd Gobaith Cymru (the Welsh League of Youth), were abandoned for several reasons, including fear of associating Elizabeth with conscientious objectors in the Urdd at a time when Britain was at war. Welsh politicians suggested she be made Princess of Wales on her 18th birthday. Home Secretary, Herbert Morrison supported the idea, but the King rejected it because he felt such a title belonged solely to the wife of a Prince of Wales and the Prince of Wales had always been the heir apparent. In 1946, she was inducted into the Welsh Gorsedd of Bards at the National Eisteddfod of Wales.Princess Elizabeth went in 1947 on her first overseas tour, accompanying her parents through southern Africa. During the tour, in a broadcast to the British Commonwealth on her 21st birthday, she made the following pledge: "I declare before you all that my whole life, whether it be long or short, shall be devoted to your service and the service of our great imperial family to which we all belong."

Question: Who supported princess Elizabeth's appointment to Constable of Caernarfon Castle?
Herbert Morrison