Birmingham-based Fusion Building Consultancy is helping to preserve some of the country's national treasures after being appointed to carry out survey work at Petworth House and Uppark, West Sussex.

Instructed by the National Trust to conduct five- yearly surveys on eight properties on the Petworth House Estate, the company has assessed their condition and state of repair and scheduled maintenance works to be carried out over future years to protect the listed buildings.

Petworth House itself is a vast late 17th-century mansion set in a beautiful park, landscaped by Capability Brown and immortalised in Turner ' s paintings. It houses the finest collection of paintings and sculpture in the care of the National Trust.

Fusion was established in May 2002 at offices in Birmingham and Guildford and has a £1 million annual turnover.