 Word that Lewis was developing his own solutions to the minimum range problem reached the AI team at St Athan some time in early 1940. Bowen was extremely upset. He had become used to the way the researchers had been put into an ill-advised attempt at production but now Rowe was directly removing them from the research effort as well. Tizard heard of the complaints and visited Dundee in an attempt to smooth them over, which evidently failed. On 29 March 1940 a memo from Watt's DCD office announced a reorganization of the Airborne Group. Gerald Touch would move to the RAE to help develop production, installation and maintenance procedures for the Mk. IV, several other members would disperse to RAF airfields to help train the ground and air crews directly on the units, while the rest of the team, including Lovell and Hodgkin, would re-join the main radar research teams in Dundee. Bowen was notably left out of the reorganization; his involvement in AI ended. In late July, Bowen was invited to join the Tizard Mission, which left for the US in August 1940.
