[1] By 1911 business had declined and production of aircraft had ceased and after June Wright sold his aviation interests to the Coventry Ordnance Works.
[1] In September 1916 he moved to the Bradford works of the Phoenix Dynamo Manufacturing Company as technical representative for the Admiralty.
[1] Learning of Manning's background he was approached to be chief designer for the company; he was released by the Admiralty on 5 October 1916 and took up the position.
[1] With the lack of work caused by the end of the First World War a number of companies including Phoenix merged in December 1918 to form English Electric.
[1] After the last Manning-designed English Electric Kingston flying boat flew, the company announced that it was to close the aviation department and Manning was made redundant in 1926.
[1] From 1935 to 1939 he ran the airworthiness department of the British Gliding Association before moving to the Royal Aircraft Establishment at Farnborough.