If you get a chance, be sure to consider sending luxury clients to Corinthia in London. I reserved a room for the night I was in London for a brief respite from Oxford: it was over the top! The thoughtful detail was everywhere… there are connecting rooms in abundance for families. While my room had connectors on either side, it was still quiet. I took a tour of the penthouses and they are one-bedroom and two-story and spacious. The roof decks had stunning views over London, and one even had a hot tub!
My executive room opened on a small balcony for easy ventilation and looked into an interior courtyard that was very intimate for a hotel with 300 rooms. Below ground there's an indoor pool, gym, spa, sauna. Dinner in the Lobby Bar was cool and casual and many guests were enjoying the space, as well as another colorful small outdoor bar, which was delightful for a good summer evening.
Service is so critical to how good a hotel is, and the Corinthia had the most friendly and welcoming staff, not the least bit stuffy, and genuine in their service. I loved my stay at Corinthia which is so well located in London: on the Thames and nearby to theatre, Piccadilly, and more. I recommend you put it at the top of the list for a luxury stay in London and the British Isles!