Editing Supermarine (section)

===Bird takes over===

In the early 1920s the company developed a series of similar one-off amphibians. The most notable of these was the Seal II, which was a three-seater fleet spotter paid for by the Air Ministry. After it performed well during its evaluation by the RAF, two examples of an improved version, named the Seagull were subsequently purchased by the Air Ministry in 1922. Once these were completed faced with no further orders the company considered closing down part of the factory and laying off staff. Bird approached the Air Ministry for assistance and while he received no orders they were encouraging.{{sfn|Pegram|2016|p=43}} At the same time Scott-Paine was close to forming the British Marine Air Navigation Company, which it was expected would place an order for aircraft with Supermarine. In expectation of receiving an order the directors decided not to reduce staff numbers. Meanwhile, to meet the requirements of the expected order Mitchell designed the Sea King in late 1922 to carry six passengers in an enclosed cabin. After receiving confirmation that subsidies would be available from the British government Scott-Paine was able together with Southern Rail and the Asiatic Petroleum to establish the British Marine Air Navigation Company in 1923.  They subsequently ordered three Sea Kings, which were used to commence a daily service on 25 September 1923 between Southampton and Guernsey.{{sfn|Pegram|2016|p=39}} Then late in 1922 orders were received from the Air Ministry for five Seagull IIs followed by two further orders in early 1923. Later orders for what was called the Seagull III were received in 1925 from the Royal Australian Navy.{{cn|date=May 2025}}

Partly due to Scott-Paine's preoccupation with developing the airline business the relationship between him and Bird began to breakdown. As a result, Bird assembled sufficient funds and on 16 November 1923 he confronted Scott-Paine who after negotiation accepted Bird's offer of £192,000 of his shares and left the company.{{sfn|Pegram|2016|p=52}}

In 1925 in an attempt to obtain additional funds with which to expand the business the original company was wound up with all creditors paid in full and a new public limited company with the same name was established and listed on the Stock Exchange with a capitalisation rising from £13,500 to £250,000.{{sfn|Pegram|2016|p=92}}

In 1926 existing Chief Draughtsman Frank Holroyd was promoted to become Assistant Chief Engineer, while Joseph "Joe" Smith was designated as Chief Draughtsman.{{sfn|Pegram|2016|p=66}}