Why the UK's third-richest family spent $1b on Churchill's war office

The hotel wing is still under construction, but the residences are almost finished and owners will move in from February. This year, a four-bedroom, second-floor, corner residence in the OWO - featuring the original 14.4-foot (4.4-metre) ceilings, mosaic tiles, turret and hexagonal reception room - smashed London property records when it sold for £11,000 a square foot for an undisclosed sum believed to be more than £30 million. The five-bedroom penthouse is still on the market and is expected to break that record again. One-bedroom residences start at £4 million, and two-bedders £7.5 million. When it's finished, the OWO and…