Great location in central London, great flat and a great hostess. Northumberland Avenue is a very grand location but Phyllis is a lovely down to earth lady with a host of interesting stories. I stayed with Phyliis and her Australian flatmate, Stephanie, and she made me and my two teenage sons very welcome. The latter particularly appreciated the late night ice cream treats she provided. Phyllis will let you have your own space, but equally is happy to chat and has led an interesting life having lived all over the world and led on micro finance initiatives. So she has a story to tell. She is a kind, lively and interesting person. The flat is beautiful with a lovely balcony looking out over the roof tops to the nearby Church of St Martin in the Fields, which sits on Trafalgar Square. So the Houses of Parliament, the National Gallery, Buckingham Palace, Nelsons Column, Westminster Abbey are all within 5-10 minutes walk of the flat. We had a great time and my sons loved Phyllis not least as she showed an active interest in them. There's lots going on on the doorstep and we saw a cut-down one hour version of the Messiah a ST Martins in the Fields and had a great meal in the evening in London's Chinese quarter which is only 10 minutes away. We also went to the Cabinet War Rooms which is 10 minutes away where Churchill and his war cabinet held their bunker meetings in safety. If you don't want to do cultural/educational things you can chill out in the nearby St James Park, where you risk getting run down by a pelican or a bevy of squirrels ( not really!) or walk down the South Bank to the Tate Modern. Covent Garden is only 10 or so minutes walk away with its shops and restaurants but also excellent street entertainers for the kids. There is street entertainment in nearby Trafalgar Square of an evening if that is your bag. But I can fully recommend a stay chez Phyllis; we enjoyed her and Stephanie's company immensely but they were also really flexible about our comings and goings and also gave us our space. Thanks Phyllis!