In 1918 she resigned from work at the college and worked for the British Air Ministry, which related to aircraft design and construction.

The first customer was the British Air Ministry, which placed an order for a machine in 1927.

Harry Grindell-Matthews tried to sell what he reported to be a death ray to the British Air Ministry in 1924.

An offer was made to British Air Ministry to run a flying school and to train personnel to man three squadrons, which was duly accepted.

The British Air Ministry issued a specification 4/34 in 1934 for a ground attack aircraft with dive bombing capability.

The British Air Ministry issued Specification "13/33" to cover this project.

Accordingly, the British Air Ministry, also investigating the crash, resolved to close the case without allocating responsibility.

In October 1936, the British Air Ministry ordered 136 Envoys for crew training.

When war broke out in Europe, the British Air Ministry prohibited private flying and most domestic air services.

Subsequently, the British Air Ministry deemed the P-40 completely unsuitable for the theater.