Hogan Lovells and Burges Salmon have both landed roles on a “landmark” £9 billion contract between the U.K. Ministry of Defence and Rolls-Royce to manufacture nuclear submarine reactors for the Royal Navy.

The deal between the Ministry of Defence (MoD) and Rolls-Royce Submarines, known as 'Unity,' is worth approximately £9 billion, making it the biggest contract of its kind in its history, according to a statement from Rolls Royce.