Cliveden boardrooms (Churchill and Macmillan) was completed. There are 48 bedrooms and suites, all of which are named after previous owners and guests (e.g. Buckingham, Westminster). In addition to the Terrace Dining room, there are a further four private dining rooms. Three rooms are licensed for civil ceremonies and each year many couples are married at Cliveden. The hotel also leases Spring Cottage by the Thames, one of the key places in the Profumo Affair, and offer it as self-contained accommodation. The hotel was listed on the London Stock Exchange for a period of time in the 1990s (as Cliveden Plc).
Norbreck Castle Hotel company and expanded the building, now named the Norbreck Hydro, in several phases, adding a ballroom, swimming pool and solarium in the early 1930s. By then the Hydro was patronised by nobility and the British upper class, in addition to being a venue for the top stars of stage, screen and radio. During World War II the hotel was commandeered by the British government as offices and accommodation for evacuated civil servants. The hotel remained under government control for eleven years until being handed back in 1951. At that time the hotel had - Open air car parking for 250