Hamptons International Estate Agents in the UK offer London property, Southern England property and International property. Specialising in property for sale, property for rent, property developments, property management and a range of property services. UK property search powered by Propertywide. Hamptons International is a trading name of Countrywide Estate Agents. Company Registered Number: 00789476 (registered in England and Wales). Registered Office: Countrywide House, <span>6</span><span> Caldecotte Lake Business Park,</span> Caldecotte Lake Drive, Caldecotte, Milton Keynes, Buckinghamshire, MK7 8JT.