We had a lovely time at Rey and Ivo's. Unfortunately we were on a tight schedule and didn't get a chance to really get to know them but they were both very welcoming and very respectful and made us feel comfortable immediately.
Besides the room said a lot about them: many travel, design and literature books, great works of art and soft and immaculate sheets... Their flat is in a perfect location, right next to the Clapham South tube station in zone two. We will definitely go back to their place if we need to stay in London again and I hope that this we'll have time to socialise more!