What an epic trip memory that would be, having afternoon tea in a royal palace. "The Orangery, Kensington Palace. This is the only royal palace in London where you can have afternoon tea, and features items like 'Orange-scented and currant scones served with Cornish clotted cream and English strawberry jam'. 15 Places For Afternoon Tea You Must Visit Before You Die"
hold hands and go ice skating in London. More of the best of London tips: http://www.europealacarte.co.uk/blog/2013/08/09/london-tips/