The final configuration of the SR.N1 has been altered considerably from its initial revision, having adopted a twin-jet configuration along with an estimated weight increase from  to . Throughout 1958 and into 1959, work on the design and production on the SR.N1 proceeded under the leadership of Saunders-Roe's chief designer Maurice Brennan.
The final configuration of the SR.N1 has undergone significant modifications from its initial design, incorporating a twin-jet engine setup along with an estimated weight increase from  to . Throughout 1958 and into 1959, development and production of the SR.N1 continued under the direction of Saunders-Roe's chief designer Maurice Brennan.