Andrew Muirhead, a major supplier to the global aviation industry, will supply low-carbon leather for guest room desks and chairs in the townhouse hotel. The property itself dates back to 19th century, and was once Queen Anne's chambers as well as a government building.
The contract was handed to Muirhead by RPW Design, which designed the interior of the £150 million hotel.
The building is owned and developed by the Supreme Hotels group, but run by InterContinental under a management contract. It is located close to the Houses of Parliament, Big Ben and Westminster Abbey.
Muirhead's pink-coloured Sateen range will provide the leather finishes on furniture across the hotel's 256 rooms, 44 luxury suites and penthouse.
Muirhead, which exports to more than 60 countries and dates back to 1840, is no stranger to supplying high-profile hotels. Its leather features in Dubai's Burj Al Arab, the world's first six-star hotel, and in Hilton hotels around the world. Muirhead also manufactured the replica of the Challenge Belt, the original trophy for golf's Open Championship, which is now presented to the winner alongside the Claret Jug.
Muirhead sales director Archie Browning said: "It was great to be able to work with RPW Design again. We worked together last year on the Saga Sapphire luxury cruise liner and our relationship continues with this latest project for InterContinental London Westminster. It is a fine hotel and our leather brings out further the luxury and quality finish of the rooms."