Hello! My family is taking our first trip to Europe in late June and I'm asking for a bit of guidance, please. We're spending 10 days in London and do not plan to rent a car. We'll rely on the tube or will hire transport to get from Heathrow to an apartment in the Waterloo section of London (any transport suggestions?) Is Uber or Lyft used, and/or is it recommended? We may take a train to see certain parts of England (again, any suggestions?), and a train to spend a day or two in Paris. Are train tickets pretty easy to purchase within a day or two of departure? We're looking forward to doing a lot of the touristy things in London: London Tower, museums, palaces, gardens, etc. I've been dreaming of this trip since I've been 16! I've been reading the boards and have found it really useful. If it's helpful to know, it will be my husband, my daughter (17), my son (21), and myself. Thank you in advance!